‖n.; pl. Nuchae [ LL. ] (Zool.) The back or upper part of the neck; the nape. [ 1913 Webster ]
a. [ Cf. F. nucal. ] (Anat.) Of, pertaining to, or in the region of, the back, or nape, of the neck; -- applied especially to the anterior median plate in the carapace of turtles. [ 1913 Webster ]