第だい一いち趾しMeanings1nounfirst toe; big toe; great toe; halluxmedicine›anatomy›Anatomical/medical term for the innermost toe. In birds, refers to the hind toe. The everyday word is 足の親指.See also: 母趾 (ぼし)第だい一いち趾しの付つけ根ねに痛いたみがある。There is pain at the base of the big toe.鳥とりの第だい一いち趾しは