Entry 1 sense Webster, 1913 Rachiodont /(rā"kĭ*ō̇*dŏnt)/ · Ra·chi·o·dont · IPA /ˌreɪkiəʊˈdɒnt/ 01 a. Same as Rhachiodont. 1. Same as Rhachiodont.(Zool.) See: Rhachiodont