tetranorditerpenoidWiktionary 原文英美构词拆解tetratetra-前缀nornor-前缀diterpenoidditerpenoid词干tetra-Four.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 tetra- + nor- + diterpenoid.释义名词noun1(organic chemistry) Any organic compound formed by removal of four methylene groups from a diterpenoid.