acrodont

from WordNet (r) 3.0 (2006)

acrodont
    n 1: an animal having teeth consolidated with the summit of the
         alveolar ridge without sockets

from The Collaborative International Dictionary of English v.0.48

Acrodont \Ac"ro*dont\, n. [Gr. 'a`kros summit + 'odoy`s,
   'odo`ntos, a tooth.] (Zool.)
   One of a group of lizards having the teeth immovably united
   to the top of the alveolar ridge. -- a. Of or pertaining to
   the acrodonts.
   [1913 Webster]