Hypertext Webster Gateway: "generatrix"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Generatrix \Gen`er*a"trix\, n.; pl. L. {Generatrices}, E.
{Generatrixes}. [L.] (Geom.)
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}.
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