Definition of "pilot whale" []

• 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. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.