round worm

roundworm

[round-wurm]
noun
any nematode, especially Ascaris lumbricoides, that infests the intestine of humans and other mammals.

Origin:
1555–65; round1 + worm

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Collins
World English Dictionary
roundworm (ˈraʊndˌwɜːm)
 
n
any nematode worm, esp Ascaris lumbricoides, a common intestinal parasite of man and pigs

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

roundworm round·worm (round'wûrm')
n.
See nematode.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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