/ Dictionary / Index P PTC: Meaning and Definition of Find definitions for: PTC Pronunciation: [key] phenylthiocarbamide. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. PT boat pter- 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