plastic /plas′tik/ [Gk, plastikos] , 1. adj., tending to build up tissues or to restore a lost part. 2. adj., conformable; capable of being molded. 3. n., a high-molecular-weight polymeric material, usually organic, capable of being molded, extruded, drawn, or otherwise shaped and then hardened into a form. 4. n., material that can be molded.
