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Noun: screwworm
  1. The larva of the fly Cochliomyia hominivorax (new world screwworm) or Chrysomya bezziana (old word screwworm). The larva can be parasitic in humans and animals and are distinctive in eating living flesh of mammals unlike most maggots which eat only dead flesh

Derived forms: screwworms

Encyclopedia: Screwworm