sine

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.

In a right triangle, the ratio of the length of the side opposite an acute angle to the length of the hypotenuse.

After that; afterward: same as since, 1.

Before now; ago: same as since, 3: as, lang syne, long ago, used also as a noun, especially in the phrase auld langsyne, old times (see langsyne).

After; since: same as since.

A gulf.

In trigonometry, formerly, with reference to any arc of a circle, the line drawn from one extremity of the arc at right angles to the diameter which passes through its other extremity; now ordinarily, with reference not to the arc but to the angle which it subtends at the center of the circle, the ratio of the aforesaid line to the radius of the circle.

the function expressed by the series These functions were invented by Wronski.

To strain.

To leave off milking a cow.