Etymology From Middle English resyn, resyne, from Old French résine, from Latin resīna. Doublet of rosin.
1
A viscous water-insoluble hydrocarbon exudate of certain plants, or such a substance as a component of a plant exudate; used in lacquers, varnishes and many other applications.
Pine trees produce a sticky resin.
But those who attack violists shouldn't throw resin. Once the ergonomic viola catches on what instrument will be immune?1997 August 9, Edward Rothstein, “A Comeback for the Viola. No Joking.”, in The New York Times, archived from the original on 27 Feb 2021:
2
Any synthetic compound of similar properties.
The artist used synthetic resin in her sculptures.