noun
Meaning 1
A mammal which lives partly or wholly in the ocean, or at least is heavily dependent on the ocean for its lifestyle; such as the cetaceans, the sirenians, the pinnipeds, the sea otter, or the polar bear.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: sea mammal
Antonyms: none provided
Broader terms: mammal, vertebrate, animal, organism, creature