Meanings
sine1
plural sines
- mathematicsIn a right triangle, the ratio of the length of the side opposite an angle to the length of the hypotenuse.
Synonyms: sin
SINE2
plural SINEs
- abbreviationacronymbiologyAcronym of short interspersed element, a type of retrotransposon in genomics.
- abbreviationacronymAcronym of selective inhibitors of nuclear export, a drug for epithelioid sarcoma.
Synonyms & antonyms
nounIn a right triangle, the ratio of the length of the side opposite an angle to the length of the hypotenuse.
More synonyms by meaning
nounratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
- Proto-Indo-European*sinos
- Proto-Italic*sinus
- Arabicجِيبَ (jība)
- Latinsinus
- Englishsine
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.
More words from Latin, Arabic, Sanskrit
Full word history & related roots →Translations
Afrikaans sinus, sinusse
- sinustrigonometric function
- sinussetrigonometric function
Arabic جَيْب
- جَيْب (jayb)trigonometric function
Basque sinu
- sinutrigonometric function
Bulgarian синус
- синус (sinus)trigonometric function
Catalan sinus
- sinustrigonometric function
Chinese Cantonese 正弦
- 正弦trigonometric function
Chinese Mandarin 正弦
- 正弦 (zhèngxián)trigonometric function
Czech sinus
- sinustrigonometric function
Danish sinus
- sinustrigonometric function
Dutch sinus
- sinustrigonometric function
Esperanto sinuso
- sinusotrigonometric function
Finnish sini
- sinitrigonometric function
French sinus
- sinustrigonometric function
German Sinus
- Sinustrigonometric function
Greek ημίτονο
- ημίτονο (imítono)trigonometric function
Hebrew סינוס
- סינוס (sinus)trigonometric function
Hindi ज्या
- ज्या (jyā)trigonometric function
Hungarian szinusz
- szinusztrigonometric function
Icelandic sínus
- sínustrigonometric function
Indonesian sinus
- sinustrigonometric function
Irish síneas
- síneastrigonometric function
Italian seno
- senotrigonometric function
Japanese サイン, 正弦
- サイン (sain)trigonometric function
- 正弦 (seigen)trigonometric function
Korean 사인, 정현
- 사인 (sain)trigonometric function
- 정현 (jeonghyeon)trigonometric function
Latvian sinuss
- sinusstrigonometric function
Malay sinus
- sinustrigonometric function
Norwegian sinus
- sinustrigonometric function
Persian جیب, سینوس
- جیب (jayb, jeyb)trigonometric function
- سینوس (sinus)trigonometric function
Polish sinus
- sinustrigonometric function
Portuguese seno
- senotrigonometric function
Romanian sinus
- sinustrigonometric function
Russian си́нус
- си́нус (sínus)trigonometric function
Slovak sínus
- sínustrigonometric function
Spanish seno
- senotrigonometric function
Swedish sinus
- sinustrigonometric function
Tagalog sinway
- sinwaytrigonometric function
Tamil செவ்வளை
- செவ்வளை (cevvaḷai)trigonometric function
Thai ไซน์
- ไซน์ (saai)trigonometric function
Ukrainian си́нус
- си́нус (sýnus)trigonometric function
Vietnamese sin
- sintrigonometric function
Rhymes & wordplay
Rhymes with sine
Sounds the same
Anagrams
Cite this entry
sine. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/sine
“sine.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sine. Accessed November 2, 2026.
WatkinsX Dictionary, s.v. “sine,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/sine.
Source: sine on Wiktionary, CC BY-SA 4.0.