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

 

silkworm

 noun
noun
BrE BrE//ˈsɪlkwɜːm//
 
; NAmE NAmE//ˈsɪlkwɜːrm//
 
Invertebrates
 
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a caterpillar (= a small creature like a worm with legs) that produces silk thread See related entries: Invertebrates Word Origin Old English seolcwyrm (see silk, worm).
See the Oxford Advanced American Dictionary entry: silkworm