Geometry. A straight line that meets a curve or surface at a given point, typically without crossing it at that point (even if extended); = tangent…

Geometry. A circumscribed or inscribed line, esp. a tangent of a curve. Now rare and historical.

Mathematics (elliptical for tangent line.) Geometry. A straight line which touches a curve (or curved surface), i.e. meets it at a point and…

a tangent to a conic section at one of the points where the latus rectum intersects the curve.

the tangent of half an arc.

Geometry. (See quot.)

A line that touches a curve or surface at two different points; a double tangent.

The tangent of the angle between a line and the horizontal; the ratio of the projection on the y-axis of an infinitesimal segment of a graph to…