Thecodontia

from WordNet (r) 3.0 (2006)

Thecodontia
    n 1: extinct terrestrial reptiles having teeth set in sockets;
         of the late Permian to Triassic [syn: {Thecodontia}, {order
         Thecodontia}]

from The Collaborative International Dictionary of English v.0.48

Thecodontia \The`co*don"ti*a\, n. pl. [NL.] (Paleon.)
   A group of fossil saurians having biconcave vertebrae and the
   teeth implanted in sockets.
   [1913 Webster]

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