sine (s n)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.] |   sin  = a/c |
sine
Noun
(in trigonometry) the ratio of the length of the opposite side to that of the hypotenuse in a right-angled triangle [Latin sinus a bend]
| sine (sn) 1. The ratio of the length of the side opposite an acute angle in a right triangle to the length of the hypotenuse. 2. 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. 3. A function of a number x, equal to the sine of an angle whose measure in radians is equal to x. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | sine - ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle circular function, trigonometric function - function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle |
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