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

 

lugworm

 noun
noun
BrE BrE//ˈlʌɡwɜːm//
 
; NAmE NAmE//ˈlʌɡwɜːrm//
 
Invertebrates
 
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a large worm that lives in the sand by the sea. Lugworms are often used as bait on a hook to catch fish. See related entries: Invertebrates Word Origin early 19th cent.: from earlier lug ‘lugworm’ (of unknown origin) + worm.
See the Oxford Advanced American Dictionary entry: lugworm