/ Dictionary / Index H heli-: Meaning and Definition of Find definitions for: heli- Pronunciation: [key] var. ofbefore a vowel: helianthus. heli- Pronunciation: [key] a combining form representingin compound words: helidrop; helilift; helitaxi. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Helgoland heliacal Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language