| a small, common whale, Globicephala sieboldii, of tropical and temperate seas, having a bulbous head. |
| pilot whale n. Any of several large, usually black dolphins of the genus Globicephala, having an outward-curving globular forehead and noted for their occasional mass strandings. Also called blackfish, pothead whale. |
| pothead whale n. See pilot whale. [From its globular head.] |
