nortropaneWiktionary 原文英美构词拆解nornor-前缀tropanetropane词干nor-(organic chemistry) A compound derived from another by removal of a radical, especially by removal of methyl or methylene.词源说明From nor- + tropane.释义名词noun1(organic chemistry) A bicyclic heterocycle derived from tropane by loss of a methylene group; any derivative of this compound.