Latus rectum : The line drawn through a focus of a conic section parallel to the directrix and terminated both ways by the curve. It is the parameter of the principal axis. See Focus, and Parameter.

Example:


Taxonomy
conic section, ellipse, conic sections, hyperbola, intersection points, circle, parabola, equation, directrix, eccentricity, plane, rectangular hyperbola, Projective conics, intersection, the distance, degenerate, parameters, latus rectum.

Defination from the web:
Latus rectum) Jump to: navigation, search. Types of conic sections: 1. Parabola ... where e is the eccentricity and l is the semi-latus rectum (see below) ...