Definition of guillemot noun from the Oxford Advanced Learner's Dictionary

 

guillemot

 noun
noun
BrE BrE//ˈɡɪlɪmɒt//
 
; NAmE NAmE//ˈɡɪlɪmɑːt//
 
Birds
 
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a black and white bird with a long narrow beak that lives near the sea See related entries: Birds Word Origin late 17th cent.: from French, diminutive of Guillaume ‘William’.
See the Oxford Advanced American Dictionary entry: guillemot