/ Dictionary / Index L lb. ap.: Meaning and Definition of Find definitions for: lb. ap. Pronunciation: [key] — Pharm. Pharm. pound apothecary's. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lb. L bar Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language