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