any of a class of nonvolatile, solid or semisolid organic substances, as copal or mastic, that consist of amorphous mixtures of carboxylic acids and are obtained directly from certain plants as exudations or prepared by polymerization of simple molecules: used in medicine and in the making of varnishes and plastics.
a substance of this type obtained from certain pines; rosin.
verb (used with object)
to treat or rub with resin.
any of a group of solid or semisolid amorphous compounds that are obtained directly from certain plants as exudations. They are used in medicine and in varnishes
any of a large number of synthetic, usually organic, materials that have a polymeric structure, esp such a substance in a raw state before it is moulded or treated with plasticizer, stabilizer, filler, etc Compare plastic (sense 1)
(transitive) to treat or coat with resin

resin res·in (rěz’ĭn)

Any of numerous clear to translucent yellow or brown, solid or semisolid, viscous substances of plant origin, such as copal, rosin, and amber.

Any of numerous physically similar polymerized synthetics or chemically modified natural resins including thermoplastic materials and thermosetting materials.


A precipitate formed by the addition of water to certain tinctures.


Any of numerous clear or translucent, yellowish or brownish substances that ooze from certain trees and plants. Resins are used in products such as varnishes, lacquers, adhesives, plastics, and drugs. Balsam is a resin.

Any of various artificial substances, such as polyurethane, that have similar properties to natural resins and are used to make plastics.



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    adjective 1. full of or containing resin. 2. of the nature of or resembling resin. 3. pertaining to or characteristic of resin. resinous res·in·ous (rěz’ə-nəs) adj. Of, relating to, or derived from a resin.

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