concamerate

from The Collaborative International Dictionary of English v.0.48

Concamerate \Con*cam"er*ate\ (k[o^]n*k[a^]m"[~e]r*[=a]t), v. t.
   [L. concameratus, p. p. of concamerare to arch over. See
   {Camber}.]
   1. To arch over; to vault.
      [1913 Webster]

            Of the upper beak an inch and a half consisteth of
            one concamerated bone.                --Grew.
      [1913 Webster]

   2. To divide into chambers or cells. --Woodward.
      [1913 Webster]