A condition in which the circulation is retarded, and the
entire mass of blood is less oxygenated than it normally is.
1. (Her.) A fabulous two-legged, winged creature, like a cockatrice, but having the head of a dragon, and without spurs. [Written also wyvern.] The jargon of heraldry, its griffins, its mold warps, its wiverns, and its dragons....