Standard Lemma guide

isotonic

adj · 9 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.

  • US: Recorded audio is listed in the source snapshot.
  • /ˌɑɪ.səˈtɑː.nɪk/
  • CMU ARPABET: AY2 S AH0 T AA1 N IH0 K Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Having the same osmotic pressure.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Having the same concentration of solutes as human blood.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Examples

  • Use an isotonic saline solution in your neti pot to prevent irritation of your nasal passages.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

Having equal tension.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

adj

Meaning 4

Of or involving muscular contraction against resistance in which the length of the muscle changes. Antonym is isometric. Isotonic movements are either concentric (working muscle shortens) or eccentric (working muscle lengthens). See also Wikipedia:Isotonic (exercise physiology)

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: medicine, physiology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

adj

Meaning 5

Having the same tone.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: entertainment, lifestyle, music

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

adjective

Meaning 6

of or involving muscular contraction in which tension is constant while length changes

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: isometric

7

adjective

Meaning 7

(used of solutions) having the same or equal osmotic pressure

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: isosmotic

Antonyms: hypertonic, hypotonic

8

adjective

Meaning 8

relating to or characterized by the equal intervals of a musical scale

Definition source: Princeton WordNet 3.0

Examples

  • isotonic tuning

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

adjective satellite

Meaning 9

of two or more muscles; having equal tension

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Etymology tree Ancient Greek ῐ̓́σος (ĭ́sos)lbor. English iso- Proto-Indo-European *ten- Proto-Indo-European *-os Proto-Indo-European *tónos Proto-Hellenic *tónos Ancient Greek τόνος (tónos) Proto-Indo-European *-kos Proto-Hellenic *-kos Ancient Greek -κός (-kós) Ancient Greek -ικός (-ikós) Ancient Greek τονῐκός (tonĭkós) English tonic English isotonic From iso- + tonic.

Across languages

Translations

16 source translations are retained for this English entry.

  • Catalan: isotònic — having the same osmotic pressure
  • Chinese Mandarin: 等渗 (děngshèn) — having the same osmotic pressure
  • Czech: izotonický — having the same osmotic pressure
  • Czech: isotonický — having the same osmotic pressure
  • Finnish: isotoninen — having the same osmotic pressure
  • French: isotonique — having the same osmotic pressure
  • German: isotonisch — having the same osmotic pressure
  • Hungarian: izotóniás — having the same osmotic pressure
  • Ido: izotonika — having the same osmotic pressure
  • Italian: isotonico — having the same osmotic pressure
  • Polish: izotoniczny — having the same osmotic pressure
  • Portuguese: isotónico — having the same osmotic pressure
  • Portuguese: isotônico — having the same osmotic pressure
  • Russian: изотони́ческий (izotoníčeskij) — having the same osmotic pressure
  • Spanish: isotónico — having the same osmotic pressure
  • Turkish: izotonik — having the same osmotic pressure