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horsehair worm

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noun
  1. any long, slender worm of the phylum Nematomorpha, developing parasitically on insects and crustaceans, and free-living as adults in streams and ponds.
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Origin of horsehair worm

First recorded in 1745–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for horsehair worm

horsehair worm

noun
  1. another name for hairworm (def. 2)
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012