Po"rism (?), n. [Gr. a thing procured, a deduction from a demonstration, fr. to bring, provide: cf. F. porisme.]
A proposition affirming the possibility of finding such conditions as will render a certain determinate problem indeterminate or capable of innumerable solutions.
2. Gr. Geom.
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.
© Webster 1913.