sine
Mathematical term for the trigonometric function sine. Used in geometry, calculus, and physics.
The sine function is defined as the ratio of the opposite side to the hypotenuse in a right triangle.
This graph represents a sine curve.
sine wave
sine curve
From 正 (correct, positive) and 弦 (bowstring, chord), a calque of the mathematical term 'sine'. The exact historical derivation is uncertain.