Definition of cockatrice:
(n) :
a legendary creature about the size and shape of a
dragon or
wyvern, but in appearance resembling a giant
rooster, with some lizard-like characteristics
"Peace reigns in happy Luxor. The lion lies down with the lamb, and the child, if it will, may harmlessly put its hand into the cockatrice's den" -- "The Spell of Egypt" by J. Walker McSpadden