/ Dictionary / Index A algo-: Meaning and Definition of Find definitions for: algo- Pronunciation: [key] a combining form meaning “pain,” used in the formation of compound words: algophobia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. alginic acid algoid Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language