tur·pen·tine 
(tûrpən-tīn′)
(tûrpən-tīn′)n.
1. A thin volatile terpenoid essential oil, C10H16, obtained by steam distillation or other means from the wood or exudate of certain pine trees and used as a paint thinner, solvent, and medicinally as a liniment. Also called oil of turpentine, spirit of turpentine.
2. The sticky mixture of resin and volatile oil from which turpentine is distilled.
3. A brownish-yellow resinous liquid obtained from the terebinth.
tr.v. tur·pen·tined, tur·pen·tin·ing, tur·pen·tines
1. To apply turpentine to or mix turpentine with.
2. To extract turpentine from (a tree).
[Middle English, resin of the terebinth, from Old French terebentine, from Latin terebinthina (rēsīna), terebinth (resin), from Greek terebinthinē, feminine of terebenthinos, from terebinthos, terebinth tree.]
tur′pen·tinic (-tĭnĭk), tur′pen·tinous (-tĭnəs) adj.