Pronunciation: (ē"kwu-prob'u-bu-liz"um, ek"wu-), [key]
—n. Rom. Cath. Theol.
a theory that in cases of doubt as to the lawfulness or unlawfulness of an action, it is permissible to follow either argument. Cf. probabilism (def. 2).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.