/ Dictionary / Index P PDB: Meaning and Definition of Find definitions for: PDB Pronunciation: [key] para-dichlorobenzene. Pd.B. Pronunciation: [key] Bachelor of Pedagogy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. PDA Pd.D. Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language