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

 

barnacle

 noun
noun
BrE BrE//ˈbɑːnəkl//
 
; NAmE NAmE//ˈbɑːrnəkl//
 
Invertebrates
 
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a small shellfish that attaches itself to objects underwater, for example to rocks and the bottoms of ships See related entries: Invertebrates Word Origin late 16th cent.: from medieval Latin bernaca, of unknown origin. In Middle English the term denoted the barnacle goose, whose breeding grounds were then unknown and which was thought to hatch from the shell of the crustacean to which it gave its name.
See the Oxford Advanced American Dictionary entry: barnacle

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