/ Dictionary / Index B bytownite: Meaning and Definition of Find definitions for: by•town•ite Pronunciation: (bī-tou'nīt), [key] — n. a blue to dark-gray mineral near the anorthite end of the plagioclase feldspar group. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Bytom byway 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