resin
n. C / Un. a sticky substance that comes from some trees and plants. It is often used to make glue, paint, or plastic.
n. a thick, sticky organic substance secreted by many plants, particularly coniferous trees. It is also produced synthetically for use in polymer chemistry and industrial manufacturing.
The pine tree leaks sticky resin from its bark.
Artists often use clear synthetic resin to preserve delicate objects inside a solid block.
Amber is actually fossilised tree resin that has hardened over millions of years, often trapping prehistoric insects within its translucent structure.
From Middle English resyn, resyne, from Old French résine, from Latin resīna. Doublet of rosin.
Uncountable when referring to the substance generally; countable when referring to specific chemical types or varieties.