- 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. 2018
- US and Canadian any of various woodlice, esp any of the genera Oniscus and Porcellio
C18: from its resemblance to a pig in shape