Capable of molding or of giving form or fashion to a mass of matter; having power to mold.Capable of being modeled or molded into various forms, as plaster, clay, etc.; hence, capable of change or modification; capable of receiving a new bent or direction: as, the mind is plastic in youth.Pertaining to or connected with modeling or molding; produced by or characteristic of modeling or molding: as, the plastic art (that is, sculpture in the widest sense, as distinguished from painting and the graphic arts).In biology, specifically, plasmicApplied by Liebig to the proteid constituents of animal food as serving to form the principal tissues of the body, in contradistinction to the non-nitrogenous portion of the food, which he called respiratory as serving for the production of bodily heat by their oxidation.Capable of receiving and of responding to environmental impulses which induce more or less rapid evolution of an organism as a whole or of certain of its organs: the opposite of conservative and persistent.n. The art. of modeling or molding; sculpture.n. A molder; a modeler; a statuary.n. The commercial name for any one of a class of substances, such as celluloid or viscose, which are worked into shape for use by molding or pressing when in a plastic condition.