secant

English Thesaurus

1. ratio of the hypotenuse to the adjacent side of a right-angled triangle (noun.linkdef)

hypernym	:	circular function, trigonometric function,
definition	:	function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle (noun.linkdef)

2. a straight line that intersects a curve at two or more points (noun.shape)

hypernym	:	straight line,
definition	:	a line traced by a point traveling in a constant direction; a line of zero curvature (noun.shape)