/ Dictionary / Index A allo-: Meaning and Definition of Find definitions for: allo- Pronunciation: [key] a combining form meaning “other,” used in the formation of compound words (allotrope) and in chemistry to denote the more stable of two geometric isomers. Also (except in chemistry), allo. Pronunciation: [key] allegro. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. all-nighter alloantibody Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language