psittacosaur: primitive dinosaur actually lacking horns and having only the beginning of a frill; long hind limbs and short forelimbs; may have been bipedal
ceratopsian: any of several four-footed herbivorous dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia
congenital afibrinogenemia: a rare congenital disorder of blood coagulation in which no fibrinogen is found in the blood plasma