killer whale
noun
1- a large toothed whale with distinctive black-and-white markings and a prominent dorsal fin. It lives in groups that hunt fish, seals, and penguins cooperatively.逆戟鲸, 虎鲸。亦称ORCA.
1.1
- Orcinus orca, family Delphinidae.拉丁名Orcinus orca, 海豚科。