1. (n.)generatrix Math. an element, as a line, that generates a figure.
Etymology: (1830–40; < L)
Definition of 'generatrix'
Webster Dictionary
1. (noun)generatrix that which generates; the point, or the mathematical magnitude, which, by its motion, generates another magnitude, as a line, surface, or solid; -- called also describent
Definitions of generatrix 
