whale·bone (wālbōn′, hwāl-)
1. The elastic, horny material forming the fringed plates that hang from the upper jaw of baleen whales and strain plankton from the water. Also called baleen.
2. An object made of this material.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.