Cutting; dividing into two parts; as, a secant line.
- A straight line intersecting a curve at two or more points.
- The straight line drawn from the center through one end of a circular arc and intersecting the tangent to the other end of the arc.
- The ratio of the length of this line to the length of the radius of the circle.
- The reciprocal of the cosine of an angle in a right triangle.