East India kino, Malabar kino, kino gum - reddish or black juice or resin from certain trees of the genus Pterocarpus and used in medicine and tanning etc

organic compound - any compound of carbon and another element or a radical

natural resin - a plant exudate

synthetic resin - a resin having a polymeric structure; especially a resin in the raw state; used chiefly in plastics

rub - move over something with pressure; "rub my hands"; "rub oil into her skin"