sow bug definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of several small terrestrial isopods (esp. genus Oniscus) living in damp places, as under rocks
sow bug definition by American Heritage Dictionary
noun In both senses also called slater, wood louse; also called regionally doodlebug.
- Any of various small terrestrial isopod crustaceans, chiefly of the genera Oniscus and Porcellio, commonly found under logs or stones and having an oval, segmented body.
- A pill bug. See Usage Note at pill bug.
Origin: From its piglike shape.