noun, sometimes capitalized B
bé·​ar·​naise | \¦bā-är-¦nāz, -ər-;¦ber-¦nāz\
variants: or béarnaise sauce
plural -s

Definition of béarnaise 

: hollandaise sauce seasoned (as with minced shallots, tarragon, and chervil) and served with meat or fish

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First Known Use of béarnaise

1869, in the meaning defined above

History and Etymology for béarnaise

French béarnaise, feminine of béarnais of Béarn, region of southwestern France

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The first known use of béarnaise was in 1869

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a soft lustrous wool fabric with mohair

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