coelodont

from The Collaborative International Dictionary of English v.0.48

Coelodont \C[oe]"lo*dont\, a. [Gr. koi^los hollow + ?, ?,
   tooth.] (Zool.)
   Having hollow teeth; -- said of a group lizards. -- n. One of
   a group of lizards having hollow teeth.
   [1913 Webster]