# sine

Also found in: Thesaurus, Medical, Financial, Acronyms, Idioms, Encyclopedia.
sine
sin θ =
a/c

## sine

(sīn)
n. Abbr. sin
1. The ordinate of the endpoint of an arc of a unit circle centered at the origin of a Cartesian coordinate system, the arc being of length x and measured counterclockwise from the point (1, 0) if x is positive or clockwise if x is negative.
2. In a right triangle, the ratio of the length of the side opposite an acute angle to the length of the hypotenuse.

[Medieval Latin sinus (mistranslation of Arabic jayb, sine, as if jayb, fold in a garment), from Latin, curve, fold.]

## sine

(saɪn)
(of an angle) n
(Mathematics)
a. a trigonometric function that in a right-angled triangle is the ratio of the length of the opposite side to that of the hypotenuse
b. a function that in a circle centred at the origin of a Cartesian coordinate system is the ratio of the ordinate of a point on the circumference to the radius of the circle
[C16: from Latin sinus a bend; in New Latin, sinus was mistaken as a translation of Arabic jiba sine (from Sanskrit jīva, literally: bowstring) because of confusion with Arabic jaib curve]

## sine

(ˈsaɪnɪ)
prep
(Law) (esp in Latin phrases or legal terms) lacking; without

## sine

(saɪn)

n.
a fundamental trigonometric function that, in a right triangle, is expressed as the ratio of the length of the side opposite an acute angle to the length of the hypotenuse. Abbr.: sin
[1585–95; < New Latin, Latin sinus curve, fold, pocket, translation of Arabic jayb literally, pocket]

## sine

(sīn)
The ratio of the length of the side opposite an acute angle in a right triangle to the length of the hypotenuse.
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 sine - ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled trianglesincircular function, trigonometric function - function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle
Translations
sinus
sinus
sini
サイン正弦
sinus

## sine

[saɪn] N (Math) → seno m

## sine

[ˈsaɪn] n (MATHEMATICS)

## sine

n (Math) → Sinus m

## sine

[saɪn] n (Math) → seno
References in classic literature ?
But that which is specially to be noted is, that those which (as Cicero says of Pompey) are sui amantes, sine rivali, are many times unfortunate.
aliquoe magnates mulieres, quoe sine scandalo vitari non possunt
if the classical phrase might be pardoned) a sine qua non.
Noel Vanstone (after submitting himself to the sine qua non, and destroying the letter) waited anxiously for results; while Mrs.