norcarotenoidWiktionary 原文英美构词拆解nornor-前缀carotenoidcarotenoid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- + carotenoid.释义名词noun1(organic chemistry) Any compound formally derived from a carotenoid by removal of a group