pelycosauria

from WordNet (r) 3.0 (2006)

Pelycosauria
    n 1: edaphosaurus; dimetrodon [syn: {Pelycosauria}, {order
         Pelycosauria}]

from The Collaborative International Dictionary of English v.0.48

Pelycosauria \Pelycosauria\ prop. n.
   1. An order of extinct reptiles including edaphosaurus and
      dimetrodon.

   Syn: order Pelycosauria.
        [WordNet 1.5]