Standard Lemma guide

sine

noun · 4 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.

  • sīn
  • /saɪn/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • US: Recorded audio is listed in the source snapshot.
  • homophone: sign
  • homophone: syne
  • rhymes with -aɪn
  • CMU ARPABET: S AY1 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

In a right triangle, the ratio of the length of the side opposite an angle to the length of the hypotenuse.

Definition source: English Wiktionary via Wiktextract

Topics: mathematics, sciences, trigonometry

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Acronym of short interspersed element, a type of retrotransposon in genomics.

Definition source: English Wiktionary via Wiktextract

Usage: abbreviation, acronym, alt-of

Topics: biology, genetics, medicine, natural-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

Acronym of selective inhibitors of nuclear export, a drug for epithelioid sarcoma.

Definition source: English Wiktionary via Wiktextract

Usage: abbreviation, acronym, alt-of

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: sin

Antonyms: none provided

Broader terms: trigonometric function, circular function

History

Etymology

Etymology tree Proto-Indo-European *sinos Proto-Italic *sinus Latin sinusbor. English sine Borrowed from Latin sinus (“curve, bend; bosom”), a translation of Arabic جَيْب (jayb, “bosom”), a misidentification of the notation جيب (j-y-b), written without vowel diacritics, standing for Arabic جِيبَ (jība, “sine”), in turn from Sanskrit ज्या (jyā, “sine, chord, bowstring”) through the similar Sanskrit जीव (jīva, “sine, chord, life, existence”). Doublet of sinus.

Across languages

Translations

58 source translations are retained for this English entry.

  • Afrikaans: sinus — trigonometric function
  • Afrikaans: sinusse — trigonometric function
  • Albanian: sinus — trigonometric function
  • Arabic: جَيْب (jayb) — trigonometric function
  • Armenian: սինուս (sinus) — trigonometric function
  • Azerbaijani: sinus — trigonometric function
  • Basque: sinu — trigonometric function
  • Bulgarian: синус (sinus) — trigonometric function
  • Burmese: ဆိုင်း (hcuing:) — trigonometric function
  • Catalan: sinus — trigonometric function
  • Cebuano: lidpa — trigonometric function
  • Chinese Cantonese: 正弦 — trigonometric function
  • Chinese Mandarin: 正弦 (zhèngxián) — trigonometric function
  • Czech: sinus — trigonometric function
  • Danish: sinus — trigonometric function
  • Dutch: sinus — trigonometric function
  • Esperanto: sinuso — trigonometric function
  • Finnish: sini — trigonometric function
  • French: sinus — trigonometric function
  • Galician: seno — trigonometric function
  • German: Sinus — trigonometric function
  • Greek: ημίτονο (imítono) — trigonometric function
  • Gujarati: જ્યા (jyā) — trigonometric function
  • Hebrew: סינוס (sinus) — trigonometric function
  • Hindi: ज्या (jyā) — trigonometric function
  • Hungarian: szinusz — trigonometric function
  • Icelandic: sínus — trigonometric function
  • Ido: sinuso — trigonometric function
  • Indonesian: sinus — trigonometric function
  • Irish: síneas — trigonometric function
  • Italian: seno — trigonometric function
  • Japanese: サイン (sain) — trigonometric function
  • Japanese: 正弦 (seigen) — trigonometric function
  • Khmer: ស៊ីនុស (siinuh) — trigonometric function
  • Korean: 사인 (sain) — trigonometric function
  • Korean: 정현 (jeonghyeon) — trigonometric function
  • Latvian: sinuss — trigonometric function
  • Macedonian: синус (sinus) — trigonometric function
  • Malay: sinus — trigonometric function
  • Manx: sheenys — trigonometric function
  • Norwegian: sinus — trigonometric function
  • Persian: جیب (jayb, jeyb) — trigonometric function
  • Persian: سینوس (sinus) — trigonometric function
  • Polish: sinus — trigonometric function
  • Portuguese: seno — trigonometric function
  • Romanian: sinus — trigonometric function
  • Russian: си́нус (sínus) — trigonometric function
  • Serbo-Croatian: sinus — trigonometric function
  • Slovak: sínus — trigonometric function
  • Slovene: sinus — trigonometric function
  • Spanish: seno — trigonometric function
  • Swedish: sinus — trigonometric function
  • Tagalog: sinway — trigonometric function
  • Tamil: செவ்வளை (cevvaḷai) — trigonometric function
  • Thai: ไซน์ (saai) — trigonometric function
  • Ottoman Turkish: جیب (ceb) — trigonometric function
  • Ukrainian: си́нус (sýnus) — trigonometric function
  • Vietnamese: sin — trigonometric function