(Science: zoology) An aquatic carnivore (Enhydris lutris, or marina) found in the North Pacific ocean. Its fur is highly valued, especially by the Chinese. It is allied to the common otter, but is larger, with feet more decidedly webbed.
(Science: botany) sea-otter’s cabbage, a gigantic kelp of the Pacific ocean (nereocystis Lutkeana). See Nereocystis.