/ ˈrezɪn; NAmE ˈrezn/ noun [ C , U ]
1.
a sticky substance that is produced by some trees and is used in making varnish , medicine, etc.
2.
an artificial substance similar to resin, used in making plastics
► res·in·ous / ˈrezɪnəs; NAmE ˈrezənəs/ adjective :
the resinous scent of pine trees
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WORD ORIGIN
late Middle English : from Latin resina ; related to Greek rhētinē pine resin. Compare with rosin .