n. pl. plaice or plaic·es
1. A large edible marine flatfish (Pleuronectes platessa) of European coastal waters.
2. Any of various other flatfishes, such as Hippoglossoides platessoides of northern Atlantic coastal waters.
[Middle English, from Old French plais, from Vulgar Latin *platīx, alteration of Late Latin platessa, probably ultimately from Greek platus, broad; see plat- in the Appendix of Indo-European roots.]
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.