Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
any of several small terrestrial isopods (esp. genus Oniscus) living in damp places, as under rocks
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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.