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béar·naise sauce(bâr-nāz′, bā′är-, -ər-)
A sauce of butter and egg yolks that is flavored with vinegar, wine, shallots, tarragon, and chervil.
[French béarnaise, feminine of béarnais, of Béarn.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.