rhachidianWiktionary 原文英美构词拆解rhachidrhachis词干ian-ian后缀-ian(as an adjective) From, related to, or like. · (as a noun) One from, belonging to, relating to, or like.词源说明From rhachis + -ian with an unetymological -id- added to the stem.释义形容词adjective1(anatomy) Of or pertaining to the rachis.