any of several small, terrestrial isopods, especially of the genus Oniscus; wood louse.
Origin of sow bug
First recorded in 1740–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
US and Canadian any of various woodlice, esp any of the genera Oniscus and Porcellio
Word Origin for sow bug
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