/ Dictionary / Index B bimolecular: Meaning and Definition of Find definitions for: bi•mo•lec•u•lar Pronunciation: (bī"mu-lek'yu-lur), [key] — adj. Chem. having or involving two molecules. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bimolecular (Thesaurus) bimodal bimonthly Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language