do·tri·a·con·tane \|dōˌtrīəˈkän.ˌtān\noun (-s) Etymology: International Scientific Vocabulary dotriacont- (from do- — as in dodeca- — + triacont- — from Greek triakonta thirty) + -ane : a paraffin hydrocarbon of the formula C32H66; especially: the crystalline normal isomer CH3(CH2)30CH3