/ Dictionary / Index B B.C.S.: Meaning and Definition of Find definitions for: B.C.S. Pronunciation: [key] Bachelor of Chemical Science. Bachelor of Commercial Science. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. B.C.P. BC soil Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language