sine

Meaning

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

Synonyms

sin

sinus

minus

sans

signature

without

autograph

sinusoidal envelope

chord

Pronounced as (IPA)

/saɪn/

Etymology

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.