# Definition of 'sine'

noun (of an angle)

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.

Abbreviation: sina 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

Collins English Dictionary. Copyright © HarperCollins Publishers

## Word origin of 'sine'

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 curveWebster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.

## Word origin of 'sine'

ML sinus (< L, a bend, curve, hanging fold of a toga), used as transl. of Ar jaib, sine, bosom of a garment## Example sentences containing 'sine'

It would not be too many stages before it vanished altogether and a bathroom would become a sine qua non for our future happiness.

GOODBYE CURATE (2000)Giving up one's freedom is, paradoxically, the sine qua non of proceeding on the path to liberation.

THE BOOK OF THE DIE (2000)## Trends of 'sine'

View usage over:

## Source

Definition of

**sine**from the Collins English Dictionary
## Comments