Pronunciation: (wôl'rus, wol'-), [key]
—pl. -rus•es, (esp. collectively) -rus.
a large marine mammal, Odobenus nosmarus, of arctic seas, related to the seals, and having flippers, a pair of large tusks, and a tough, wrinkled skin.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.