(n) tall Paleozoic trees superficially resembling modern screw pines; structurally intermediate in some ways between cycads and conifers, Syn. genus Cordaites
n. a genus of tall Paleozoic trees superficially resembling modern screw pines; they were structurally intermediate in some ways between cycads and conifers. Syn. -- genus Cordaites. [ WordNet 1.5 ]