porism

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porism

(ˈpɔːrɪzəm)
n
(Mathematics) a type of mathematical proposition considered by Euclid, the meaning of which is now obscure. It is thought to be a proposition affirming the possibility of finding such conditions as will render a certain problem indeterminate or capable of innumerable solutions
[C14: from Late Latin porisma, from Greek: deduction, from porizein to deduce, carry; related to Greek poros passage]
porismatic, porismatical adj

porism

Rare. a kind of geometrical proposition of ancient Greek mathematics arising during the investigation of some other proposition either as a corollary or as a condition that will render a certain problem indeterminate. — porismatic, adj.
See also: Mathematics