(1):

(n.) A large sting ray (Dasybatis, / Trygon, Sayi) native of the Southern United States. It is destitute of large spines on the body and tail.

(2):

(n.) A large sting ray (Rhinoptera bonasus, or R. quadriloba) of the Atlantic coast of the United States. Its snout appears to be four-lobed when viewed in front, whence it is also called cow-nosed ray.