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pill bug

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noun
  1. any of various small terrestrial isopods, especially of the genera Armadillidium and Oniscus, which can roll themselves up into a spherical shape.
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Origin of pill bug

An Americanism dating back to 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for pill bug

Historical Examples

  • It looks like some sort of pill-bug half an inch long, doesn't it?

    The Animal World, A Book of Natural History

    Theodore Wood


British Dictionary definitions for pill bug

pill bug

noun
  1. any of various woodlice of the genera Armadillidium and Oniscus, capable of rolling up into a ball when disturbed
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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