Standard Lemma guide

diaphragm

noun · verb · 14 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ˈdaɪəˌfɹæm/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: D AY1 AH0 F R AE2 M Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

In mammals, a sheet of muscle separating the thorax from the abdomen, contracted and relaxed in respiration to draw air into and expel air from the lungs.

Definition source: English Wiktionary via Wiktextract

Topics: anatomy, medicine, sciences

Examples

  • thoracic diaphragm
  • pulmonary diaphragm

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Any of various membranes or sheets of muscle or ligament which separate one cavity from another.

Definition source: English Wiktionary via Wiktextract

Topics: anatomy, medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A contraceptive device consisting of a flexible cup, used to cover the cervix during intercourse.

Definition source: English Wiktionary via Wiktextract

Examples

  • cervical diaphragm
  • contraceptive diaphragm

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: contraceptive, device

4

noun

Meaning 4

A flexible membrane separating two chambers and fixed around its periphery that distends into one or other chamber as the difference in the pressure in the chambers varies.

Definition source: English Wiktionary via Wiktextract

Topics: engineering, mechanical-engineering, mechanics, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

In a speaker, the thin, semi-rigid membrane which vibrates to produce sound.

Definition source: English Wiktionary via Wiktextract

Qualifier: acoustics

Examples

  • acoustic diaphragm

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

A thin opaque structure with a central aperture, used to limit the passage of light into a camera or similar device.

Definition source: English Wiktionary via Wiktextract

Topics: arts, engineering, hobbies, lifestyle, natural-sciences, optics, photography, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

noun

Meaning 7

A permeable or semipermeable membrane.

Definition source: English Wiktionary via Wiktextract

Topics: chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

A floor slab, metal wall panel, roof panel or the like, having a sufficiently large in-plane shear stiffness and sufficient strength to transmit horizontal forces to resisting systems.

Definition source: English Wiktionary via Wiktextract

Topics: business, construction, manufacturing

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

verb

Meaning 9

To reduce lens aperture using an optical diaphragm.

Definition source: English Wiktionary via Wiktextract

Topics: arts, engineering, hobbies, lifestyle, natural-sciences, optics, photography, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

verb

Meaning 10

To act as a diaphragm, for example by vibrating.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

11

noun

Meaning 11

a mechanical device in a camera that controls size of aperture of the lens

Definition source: Princeton WordNet 3.0

Examples

  • the new cameras adjust the diaphragm automatically

Meaning relationships

Synonyms: stop

Antonyms: none provided

Broader terms: mechanical device

Narrower terms: iris, iris diaphragm

12

noun

Meaning 12

electro-acoustic transducer that vibrates to receive or produce sound waves

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: disk, disc

13

noun

Meaning 13

a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic; it is filled with spermicide and fitted over the uterine cervix

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: pessary, contraceptive diaphragm

Antonyms: none provided

Broader terms: contraceptive, preventive, preventative, contraceptive device, prophylactic device, birth control device

14

noun

Meaning 14

(anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: midriff

Antonyms: none provided

Broader terms: membrane, tissue layer, muscular structure, musculature, muscle system

History

Etymology

From Middle English diafragma, Ancient Greek διάφραγμα (diáphragma, “partition”), from διά (diá, “across”) and φράγμα (phrágma, “barrier”), from the verb φράσσω (phrássō). First attested in the late 14th century.

Across languages

Translations

178 source translations are retained for this English entry.

  • Albanian: diafragmë — anatomy: sheet of muscle separating thorax from abdomen
  • Southern Altai: буур эт (buur et) — anatomy: sheet of muscle separating thorax from abdomen
  • Arabic: حِجَاب حَاجِز (ḥijāb ḥājiz) — anatomy: sheet of muscle separating thorax from abdomen
  • Arabic: حجاب حاجز (ḥegāb ḥāgez) — anatomy: sheet of muscle separating thorax from abdomen
  • Aramaic: ܚܸܠܒܹ̈ܐ (ḥelbā) — anatomy: sheet of muscle separating thorax from abdomen
  • Assyrian Neo-Aramaic: ܦܲܪܢܘܿܣ (parnōs) — anatomy: sheet of muscle separating thorax from abdomen
  • Assyrian Neo-Aramaic: ܚܵܙܘܿܩܵܐ ܒܝܲܡܵܐ (ḥāzōqā byammā) — anatomy: sheet of muscle separating thorax from abdomen
  • Armenian: ստոծանի (stocani) — anatomy: sheet of muscle separating thorax from abdomen
  • Azerbaijani: diafraqma — anatomy: sheet of muscle separating thorax from abdomen
  • Belarusian: дыяфра́гма (dyjafráhma) — anatomy: sheet of muscle separating thorax from abdomen
  • Bulgarian: диафра́гма (diafrágma) — anatomy: sheet of muscle separating thorax from abdomen
  • Catalan: diafragma — anatomy: sheet of muscle separating thorax from abdomen
  • Chinese Mandarin: 橫膈膜 /横膈膜 (hénggémó) — anatomy: sheet of muscle separating thorax from abdomen
  • Czech: bránice — anatomy: sheet of muscle separating thorax from abdomen
  • Danish: mellemgulv — anatomy: sheet of muscle separating thorax from abdomen
  • Dutch: middenrif — anatomy: sheet of muscle separating thorax from abdomen
  • Esperanto: diafragmo — anatomy: sheet of muscle separating thorax from abdomen
  • Estonian: diafragma — anatomy: sheet of muscle separating thorax from abdomen
  • Estonian: vahelihas — anatomy: sheet of muscle separating thorax from abdomen
  • Faroese: tind — anatomy: sheet of muscle separating thorax from abdomen
  • Finnish: pallea — anatomy: sheet of muscle separating thorax from abdomen
  • French: diaphragme — anatomy: sheet of muscle separating thorax from abdomen
  • Georgian: დიაფრაგმა (diapragma) — anatomy: sheet of muscle separating thorax from abdomen
  • Georgian: შუასაძგიდი (šuasaʒgidi) — anatomy: sheet of muscle separating thorax from abdomen
  • German: Zwerchfell — anatomy: sheet of muscle separating thorax from abdomen
  • Greek: διάφραγμα (diáfragma) — anatomy: sheet of muscle separating thorax from abdomen
  • Ancient Greek: διάφραγμα (diáphragma) — anatomy: sheet of muscle separating thorax from abdomen
  • Hindi: मध्यपट (madhyapaṭ) — anatomy: sheet of muscle separating thorax from abdomen
  • Hindi: तनुपट (tanupaṭ) — anatomy: sheet of muscle separating thorax from abdomen
  • Hindi: मध्यच्छद (madhyacchad) — anatomy: sheet of muscle separating thorax from abdomen
  • Hungarian: rekeszizom — anatomy: sheet of muscle separating thorax from abdomen
  • Icelandic: þind — anatomy: sheet of muscle separating thorax from abdomen
  • Indonesian: diafragma — anatomy: sheet of muscle separating thorax from abdomen
  • Ingrian: diafragma — anatomy: sheet of muscle separating thorax from abdomen
  • Ingrian: verikammari — anatomy: sheet of muscle separating thorax from abdomen
  • Inuktitut: ᑲᓂᕙᐅᑎ (kanivauti) — anatomy: sheet of muscle separating thorax from abdomen
  • Irish: scairt — anatomy: sheet of muscle separating thorax from abdomen
  • Italian: diaframma — anatomy: sheet of muscle separating thorax from abdomen
  • Japanese: 横隔膜 (ōkakumaku) — anatomy: sheet of muscle separating thorax from abdomen
  • Kazakh: көкет (köket) — anatomy: sheet of muscle separating thorax from abdomen
  • Korean: 횡격막 (hoenggyeongmak) — anatomy: sheet of muscle separating thorax from abdomen
  • Korean: 가로막 (garomak) — anatomy: sheet of muscle separating thorax from abdomen
  • Central Kurdish: ناوپەنچِک (nawpençik) — anatomy: sheet of muscle separating thorax from abdomen
  • Northern Kurdish: navpençik — anatomy: sheet of muscle separating thorax from abdomen
  • Kyrgyz: диафрагма (diafragma) — anatomy: sheet of muscle separating thorax from abdomen
  • Latin: praecordia — anatomy: sheet of muscle separating thorax from abdomen
  • Latvian: diafragma — anatomy: sheet of muscle separating thorax from abdomen
  • Lithuanian: diafragma — anatomy: sheet of muscle separating thorax from abdomen
  • Macedonian: дијафра́гма (dijafrágma) — anatomy: sheet of muscle separating thorax from abdomen
  • Malay: diafragma — anatomy: sheet of muscle separating thorax from abdomen
  • Māori: pātūpoho — anatomy: sheet of muscle separating thorax from abdomen
  • Central Melanau: neb — anatomy: sheet of muscle separating thorax from abdomen
  • Khiamniungan Naga: sākhīap — anatomy: sheet of muscle separating thorax from abdomen
  • Navajo: acháshjish — anatomy: sheet of muscle separating thorax from abdomen
  • Norwegian Bokmål: mellomgolv — anatomy: sheet of muscle separating thorax from abdomen
  • Norwegian Bokmål: mellomgulv — anatomy: sheet of muscle separating thorax from abdomen
  • Norwegian Nynorsk: mellomgolv — anatomy: sheet of muscle separating thorax from abdomen
  • Old English: midhriðre — anatomy: sheet of muscle separating thorax from abdomen
  • Old English: midhrif — anatomy: sheet of muscle separating thorax from abdomen
  • Pashto: زنخول (zanxwál) — anatomy: sheet of muscle separating thorax from abdomen
  • Persian: دیافراگم (diyâfrâgm) — anatomy: sheet of muscle separating thorax from abdomen
  • Persian: میانبند (miyânband) — anatomy: sheet of muscle separating thorax from abdomen
  • Persian: پرده حاجز (parde-ye hājez) — anatomy: sheet of muscle separating thorax from abdomen
  • Polish: przepona — anatomy: sheet of muscle separating thorax from abdomen
  • Portuguese: diafragma — anatomy: sheet of muscle separating thorax from abdomen
  • Romanian: diafragmă — anatomy: sheet of muscle separating thorax from abdomen
  • Russian: диафра́гма (diafrágma) — anatomy: sheet of muscle separating thorax from abdomen
  • Serbo-Croatian: прѐчага — anatomy: sheet of muscle separating thorax from abdomen
  • Serbo-Croatian: о̀шит — anatomy: sheet of muscle separating thorax from abdomen
  • Serbo-Croatian: дијафра̀гма — anatomy: sheet of muscle separating thorax from abdomen
  • Serbo-Croatian: prèčaga — anatomy: sheet of muscle separating thorax from abdomen
  • Serbo-Croatian: òšit — anatomy: sheet of muscle separating thorax from abdomen
  • Serbo-Croatian: dijafràgma — anatomy: sheet of muscle separating thorax from abdomen
  • Slovak: bránica — anatomy: sheet of muscle separating thorax from abdomen
  • Slovak: diafragma — anatomy: sheet of muscle separating thorax from abdomen
  • Slovene: prepona — anatomy: sheet of muscle separating thorax from abdomen
  • Slovene: diafragma — anatomy: sheet of muscle separating thorax from abdomen
  • Spanish: diafragma — anatomy: sheet of muscle separating thorax from abdomen
  • Swedish: mellangärde — anatomy: sheet of muscle separating thorax from abdomen
  • Swedish: diafragma — anatomy: sheet of muscle separating thorax from abdomen
  • Tagalog: lamang-tabing — anatomy: sheet of muscle separating thorax from abdomen
  • Tajik: диафрагма (diafragma) — anatomy: sheet of muscle separating thorax from abdomen
  • Thai: กะบังลม (gà-bang-lom) — anatomy: sheet of muscle separating thorax from abdomen
  • Turkish: diyafram — anatomy: sheet of muscle separating thorax from abdomen
  • Ukrainian: діафра́гма (diafráhma) — anatomy: sheet of muscle separating thorax from abdomen
  • Uzbek: diafragma — anatomy: sheet of muscle separating thorax from abdomen
  • Vietnamese: cơ hoành — anatomy: sheet of muscle separating thorax from abdomen
  • Volapük: ditavöl — anatomy: sheet of muscle separating thorax from abdomen
  • Welsh: llengig — anatomy: sheet of muscle separating thorax from abdomen
  • Bulgarian: мембра́на (membrána) — anatomy: separating membrane or sheet of muscle
  • Finnish: kalvo — anatomy: separating membrane or sheet of muscle
  • Hindi: मध्यपट (madhyapaṭ) — anatomy: separating membrane or sheet of muscle
  • Macedonian: мембра́на (membrána) — anatomy: separating membrane or sheet of muscle
  • Russian: мембра́на (membrána) — anatomy: separating membrane or sheet of muscle
  • Swahili: kiwambo — anatomy: separating membrane or sheet of muscle
  • Catalan: diafragma — contraceptive device
  • Danish: pessar — contraceptive device
  • Dutch: pessarium — contraceptive device
  • Finnish: pessaari — contraceptive device
  • French: diaphragme — contraceptive device
  • German: Diaphragma — contraceptive device
  • German: Scheidendiaphragma — contraceptive device
  • German: Pessar — contraceptive device
  • Hindi: मध्यपट (madhyapaṭ) — contraceptive device
  • Irish: diafram — contraceptive device
  • Italian: diaframma — contraceptive device
  • Macedonian: дијафра́гма (dijafrágma) — contraceptive device
  • Māori: pātātea — contraceptive device
  • Portuguese: diafragma — contraceptive device
  • Russian: диафра́гма (diafrágma) — contraceptive device
  • Serbo-Croatian: дијафра̀гма — contraceptive device
  • Serbo-Croatian: dijafràgma — contraceptive device
  • Spanish: diafragma — contraceptive device
  • Swedish: pessar — contraceptive device
  • Bulgarian: мембра́на (membrána) — mechanics: flexible membrane
  • Catalan: diafragma — mechanics: flexible membrane
  • Danish: membran — mechanics: flexible membrane
  • Dutch: diafragma — mechanics: flexible membrane
  • Dutch: membraan — mechanics: flexible membrane
  • Finnish: kalvo — mechanics: flexible membrane
  • French: membrane — mechanics: flexible membrane
  • German: Membran — mechanics: flexible membrane
  • Irish: scannán — mechanics: flexible membrane
  • Italian: diaframma — mechanics: flexible membrane
  • Korean: 격막 (gyeongmak) — mechanics: flexible membrane
  • Korean: 가로막 (garomak) — mechanics: flexible membrane
  • Macedonian: мембра́на (membrána) — mechanics: flexible membrane
  • Māori: kiri tōiri — mechanics: flexible membrane
  • Norwegian Bokmål: membran — mechanics: flexible membrane
  • Norwegian Nynorsk: membran — mechanics: flexible membrane
  • Portuguese: diafragma — mechanics: flexible membrane
  • Romanian: membrană — mechanics: flexible membrane
  • Romanian: diafragmă — mechanics: flexible membrane
  • Russian: мембра́на (membrána) — mechanics: flexible membrane
  • Russian: диафра́гма (diafrágma) — mechanics: flexible membrane
  • Spanish: diafragma — mechanics: flexible membrane
  • Swedish: membran — mechanics: flexible membrane
  • Bulgarian: мембра́на (membrána) — acoustics: vibrating membrane in a speaker
  • Catalan: diafragma — acoustics: vibrating membrane in a speaker
  • Danish: membran — acoustics: vibrating membrane in a speaker
  • Finnish: kalvo — acoustics: vibrating membrane in a speaker
  • Finnish: kaiutinkalvo — acoustics: vibrating membrane in a speaker
  • Gujarati: સ્વરપડદો (svarpaḍdo) — acoustics: vibrating membrane in a speaker
  • Irish: scannán — acoustics: vibrating membrane in a speaker
  • Macedonian: мембра́на (membrána) — acoustics: vibrating membrane in a speaker
  • Māori: kiri tōiri — acoustics: vibrating membrane in a speaker
  • Norwegian Bokmål: membran — acoustics: vibrating membrane in a speaker
  • Norwegian Nynorsk: membran — acoustics: vibrating membrane in a speaker
  • Polish: membrana — acoustics: vibrating membrane in a speaker
  • Romanian: membrană — acoustics: vibrating membrane in a speaker
  • Russian: мембра́на (membrána) — acoustics: vibrating membrane in a speaker
  • Russian: диффузо́р (diffuzór) — acoustics: vibrating membrane in a speaker
  • Spanish: diafragma — acoustics: vibrating membrane in a speaker
  • Bulgarian: диафра́гма (diafrágma) — optics: structure with a central aperture used to limit the passage of light
  • Bulgarian: бле́нда (blénda) — optics: structure with a central aperture used to limit the passage of light
  • Danish: blænder — optics: structure with a central aperture used to limit the passage of light
  • Finnish: himmennin — optics: structure with a central aperture used to limit the passage of light
  • French: diaphragme — optics: structure with a central aperture used to limit the passage of light
  • German: Blende — optics: structure with a central aperture used to limit the passage of light
  • Irish: spiara — optics: structure with a central aperture used to limit the passage of light
  • Italian: diaframma lamellare — optics: structure with a central aperture used to limit the passage of light
  • Macedonian: дијафра́гма (dijafrágma) — optics: structure with a central aperture used to limit the passage of light
  • Macedonian: бле́нда (blénda) — optics: structure with a central aperture used to limit the passage of light
  • Norwegian Bokmål: blender — optics: structure with a central aperture used to limit the passage of light
  • Norwegian Nynorsk: blendar — optics: structure with a central aperture used to limit the passage of light
  • Polish: blenda — optics: structure with a central aperture used to limit the passage of light
  • Romanian: diafragmă — optics: structure with a central aperture used to limit the passage of light
  • Russian: диафра́гма (diafrágma) — optics: structure with a central aperture used to limit the passage of light
  • Spanish: diafragma — optics: structure with a central aperture used to limit the passage of light
  • Swedish: bländare — optics: structure with a central aperture used to limit the passage of light
  • Bulgarian: мембра́на (membrána) — chemistry: permeable or semipermeable membrane
  • Finnish: kalvo — chemistry: permeable or semipermeable membrane
  • Macedonian: мембра́на (membrána) — chemistry: permeable or semipermeable membrane
  • Russian: мембра́на (membrána) — chemistry: permeable or semipermeable membrane
  • Catalan: diafragmar — optics: to reduce lens aperture
  • Finnish: himmentää — optics: to reduce lens aperture
  • French: diaphragmer — optics: to reduce lens aperture
  • Spanish: diafragmar — optics: to reduce lens aperture