ˌpīnōˈsilvə̇n noun
( -s )
Etymology: International Scientific Vocabulary pino- (from New Latin Pinus — genus name of the Scotch pine Pinus sylvestris — , from Latin pinus pine) + sylv- (from New Latin sylvestris — specific epithet of the Scotch pine Pinus sylvestris — , from Latin silvestris of a forest, from silva forest) + -in — more at pine
: a toxic phenolic compound C 6 H 5 CH . CHC 6 H 3 (OH) 2 related to stilbene that is found in the heartwood of Scotch pine and that gives protection to the wood against fungi, insects, and chemicals (as calcium bisulfite); 5-styryl-resorcinol