1. (a.) Having the power to give form or fashion to a mass of matter; as, the plastic hand of the Creator.

2. (a.) Capable of being molded, formed, or modeled, as clay or plaster; -- used also figuratively; as, the plastic mind of a child.

3. (a.) Pertaining or appropriate to, or characteristic of, molding or modeling; produced by, or appearing as if produced by, molding or modeling; -- said of sculpture and the kindred arts, in distinction from painting and the graphic arts.

4. (n.) a substance composed predominantly of a synthetic organic high polymer capable of being cast or molded; many varieties of plastic are used to produce articles of commerce (after 1900). [MW10 gives origin of word as 1905]

5. (n.) A combining form signifying developing, forming, growing; as, heteroplastic, monoplastic, polyplastic.

Bakelite Buna Celluloid Formica Lucite Mylar PVC Perspex Plexiglas Styrofoam Teflon able to adapt acaroid resins accessible accordant acetate acetate nitrate acquiescent acrylic adaptable adaptive adhesive adjustable alkyd alterable alterative amber amenable aminoplast anal apt artificial average bendable bending biddable bogus bourgeois bright casein plastic cast plastic cellophane cellulose acetate cellulose ether cellulose nitrate cellulose plastic cellulosic changeable cheap checkered chintzy clayey clever colophony common commonplace complaisant compliant compulsive concordant conformable conformist conventional corresponding coumarone resins coumarone-indene counterfeit crummy docile ductile educable elastic epoxy ersatz ever-changing extensible extensile extruded plastic fabricable facile fake fictile flexible flexile flexuous fluid fluorocarbon plastic formable formal formalistic formational formative fossil resins furane garden garden-variety giving gum rosin gums harmonious imitation impermanent impressible impressionable in accord in keeping in line in step inexperienced influenceable instructable intelligent kaleidoscopic kosher lac resins laminate lignin like putty limber lissome lithe lithesome lot malleable manageable many-sided melamine meretricious metabolic metamorphic middle-class mobile modifiable moldable molded plastic molding compounds morphotic motivated movable multiresin mutable neoprene nitrate no great shakes nonuniform normal nylon obedient open open-minded ordinary orthodox other-directed parcel paste pedantic permutable persuadable persuasible pervious phenolic urea pinchbeck pine resins plasmatic plasmic plat pliable pliant plot polyester polymer polymeric amide polypropylene polystyrene polyvinyl chloride precisianistic protean proteiform protein plastic protoplasmic quick ready receptive regular resilient resin resin plastic resina resinate resinoid responsive ripe for instruction rosin rubbery run-of-mine run-of-the-mill schoolable sensitive sequacious sham shapable shapeable shoddy silicone resin soft springy square straight stuffy suasible submissive suburban suggestible supple susceptible swayable synthetic synthetic fabric synthetic resin synthetic rubber teachable tetrafluoroethylene thermoplastic thermosetting plastic thirsty for knowledge tract tractable tractile traditionalist trainable transient transitory unexceptional unformed unnoteworthy unremarkable unspectacular uptight urea urea formaldehyde usual variable vegetable resins vinyl waxy weak whippy willing willowy workable yielding