/ Dictionary / Index B black selenium: Meaning and Definition of Find definitions for: black' sele'nium Pronunciation: [key] — Chem. Chem. an allotropic form of selenium occurring as a black, amorphous, water-insoluble, light-sensitive powder: used chiefly in photoelectric cells. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. black sea bass black shank Related Content Daily Word Quiz: supercilious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language