/ Dictionary / Index P Plasticine: Meaning and Definition of Find definitions for: Plas•ti•cine Pronunciation: (plas'tu-sēn"), [key] — Trademark. Trademark. a brand name for a synthetic material used as a substitute for clay or wax in modeling. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plasticine (Thesaurus) plastic foam plasticity Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language