Meaning of prosyllogism

pro•syl•lo•gism

Pronunciation: (prō-sil'u-jiz"um), [key]
— n. Logic.
  1. a syllogism the conclusion of which is used as a premise of another syllogism; any of the syllogisms included in a polysyllogism except the last. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.