resin
Substance exuded from pines, firs, and other trees in gummy drops that harden in air. Varnishes are common products of the hard resins, and ointments come from the soft resins.
Rosin is the solid residue of distilled turpentine, a soft resin. The name ‘resin’ is also given to many synthetic products manufactured by polymerization; they are used in adhesives, plastics, and varnishes.
resin
| Alternative name for rosin. |
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