sine Meaning, Definition & Usage

  1. noun ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle
    sin.

WordNet

Sine noun
Etymology
LL. sinus a sine, L. sinus bosom, used in translating the Ar. jaib, properly, bosom, but probably read by mistake (the consonants being the same) for an original jiba sine, from Skr. jiva bowstring, chord of an arc, sine.
Definitions
  1. (Trig.) (a) The length of a perpendicular drawn from one extremity of an arc of a circle to the diameter drawn through the other extremity. (b) The perpendicular itself. See Sine of angle, below.
Si"ne preposition
Etymology
L.
Definitions
  1. Without.

Webster 1913