The DICT Development Group

  Nates \Na"tes\, n. pl. [L., the buttocks.]
     1. (Anat.)
        (a) The buttocks.
        (b) The two anterior of the four lobes on the dorsal side
            of the midbrain of most mammals; the anterior optic
            lobes.
            [1913 Webster]
  
     2. (Zool.) The umbones of a bivalve shell.
        [1913 Webster]

  nates
      n 1: the fleshy part of the human body that you sit on; "he
           deserves a good kick in the butt"; "are you going to sit on
           your fanny and do nothing?" [syn: buttocks, nates,
           arse, butt, backside, bum, buns, can,
           fundament, hindquarters, hind end, keister,
           posterior, prat, rear, rear end, rump, stern,
           seat, tail, tail end, tooshie, tush, bottom,
           behind, derriere, fanny, ass]