/ Dictionary / Index B Biphetamine: Meaning and Definition of Find definitions for: Bi•phet•a•mine Pronunciation: (bī-fet'u-mēn", -min), [key] — Pharm., Trademark. Pharm.,Trademark. a brand name for a preparation containing a mixture of two isomers of amphetamine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. biphenyl bipinnaria Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language