true seal

Từ điển WordNet v3.1 - WordNet Dictionary

noun

any of several seals lacking external ear flaps and having a stiff hairlike coat with hind limbs reduced to swimming flippers
• Syn:
earless seal, hair seal
• Hypernyms:
seal
• Hyponyms:
harbor seal, common seal, Phoca vitulina, harp seal, Pagophilus groenlandicus,
elephant seal, sea elephant, bearded seal, squareflipper square flipper, Erignathus barbatus, hooded seal,
bladdernose, Cystophora cristata
• Member Holonyms:
Phocidae, family Phocidae