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sow bug

[sou]
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noun
  1. any of several small, terrestrial isopods, especially of the genus Oniscus; wood louse.
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Origin of sow bug

First recorded in 1740–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for sow bug

sow bug

noun
  1. US and Canadian any of various woodlice, esp any of the genera Oniscus and Porcellio
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Word Origin

C18: from its resemblance to a pig in shape
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