sea lion

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of several large-eared seals with relatively long neck and limbs, especially Zalophus californianus, of the northern Pacific.

Century Dictionary and Cyclopedia

1. n. One of several large eared seals, or otaries. Eumetopias stelleri, the largest otary of the North Pacific, the male attaining a length of 11 to 13 feet, a girth of 8 to 10 feet, and a weight of about 1,200 pounds. It is a hair-seal, not a fur-seal. See cut under Eumetopias.
2. n. In heraldry, a bearing representing a creature having a head like that of a lion, but sometimes without the mane, two paws with long claws, and fish-like body. Also called lion-poisson and morse.

Wiktionary

1. n. A marine mammal of any of several genera in the family Otariidae.

GNU Webster's 1913

1. (Zoöl.) Any one of several large species of seals of the family Otariidæ native of the Pacific Ocean, especially the southern sea lion (Otaria jubata) of the South American coast; the northern sea lion (Eumetopias Stelleri) found from California to Japan; and the black, or California, sea lion (Zalophus Californianus), which is common on the rocks near San Francisco.

WordNet 3.0

1. n. any of several large eared seals of the northern Pacific related to fur seals but lacking their valuable coat