[L. resina, fr. Gr. rhētinē, resin of the pine]
1. A natural, amorphous, nonvolatile, soft or solid exudation of plants. It is practically insoluble in water but dissolves in alcohol.
2. Any of a class of solid or soft organic compounds of natural or synthetic origin. They are usually of high molecular weight and most are polymers. Included are polyvinyl, polyethylene, and polystyrene. These are combined with chemicals such as epoxides, plasticizers, pigments, fillers, and stabilizers to form plastics.
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