pill bug definition

  • noun:
    • a tiny terrestrial isopod crustacean for the genus Armadillidium closely related to the sow-bug and achieving a convex, segmented, versatile body allowing it to curl into a ball whenever disrupted. Within good sense also called roly-poly.
    • A sow bug.
    • Any of lots of terrestrial crustaceans, regarding the family members Armadillidiidae, including the woodlice, that will move by themselves up into a protective basketball
    • any terrestrial isopod associated with genus Armadillo, having the practice of rolling itself into a ball when disturbed. Known as additionally tablet wood-louse.
    • small terrestrial isopod with a convex segmented body that may roll up into a ball

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