Definitions for SINEsaɪn
Random House Webster's College Dictionary
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.
Ref: Abbr.: sin 4
Origin of sine:
1585–95; < NL, L sinus curve, fold, pocket, trans. of Ar jayb lit., pocket
ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle
In a right triangle, the ratio of the length of the side opposite an angle to the length of the hypotenuse.
Origin: From sinus, originally by mistranslation of جب. Ultimately from .
the length of a perpendicular drawn from one extremity of an arc of a circle to the diameter drawn through the other extremity
the perpendicular itself. See Sine of angle, below