/ Dictionary / Index A astrochemistry: Meaning and Definition of Find definitions for: as•tro•chem•is•try Pronunciation: (as"trō-kem'u-strē), [key] — n. a branch of astronomy and chemistry dealing with the chemical composition and evolution of the universe and its parts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. astrobleme astrocyte Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language