/ Dictionary / Index H helico-: Meaning and Definition of Find definitions for: helico- Pronunciation: [key] a combining form meaning “spiral”; used with this meaning and as a combining form ofin the formation of compound words: helicograph. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. helicline helicograph Related Content Daily Word Quiz: voracious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language