describent,a.andn.|dɪˈskraɪbənt| [ad. L. dēscrībentem, pr.pple. of dēscrībĕre to describe.] A.adj. ‘Describing, marking out by its motion’ (Ash 1775). B.n.Geom. A point, line, or surface, producing by its motion a line, surface, or solid; a generatrix. 1704in J. Harris Lex.Techn.