Definition of pill woodlouse in English:

pill woodlouse

noun

  • A woodlouse with a thick cuticle, which is able to roll up into a ball when threatened.

    Also called pill bug
    • ‘The common pill woodlouse has a flat grey, oval body and is able to roll into a ball when disturbed.’
    • ‘The common pill woodlouse was the only one found in drier areas of our school grounds.’