第だい五ご趾しMeanings1nounlittle toe; fifth toemedicineanatomyMedical and anatomical term for the smallest toe. In everyday conversation, 小指 (こゆび) is more common.第だい五ご趾しの骨こっ折せつは、歩ほ行こう時じに強つよい痛いたみを伴ともないます。A fracture of the little toe causes severe pain when walking.