porism Meaning, Definition & Usage

Gr. a thing procured, a deduction from a demonstration, fr. to bring, provide: cf. F. porisme.

(Geom.) A proposition affirming the possibility of finding such conditions as will render a certain determinate problem indeterminate or capable of innumerable solutions. Playfair.
(Gr. Geom.) A corollary. Brande & C. ✍ Three books of porisms of Euclid have been lost, but several attempts to determine the nature of these propositions and to restore them have been made by modern geometers.