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Noun: trilobite  'trI-lu,bIt
  1. An extinct arthropod that was abundant in Paleozoic times; had an exoskeleton divided into three parts
    "The presence of the trilobate arrowheads leads me to believe this pit dates back to the late Phrygian period"

Derived forms: trilobites

Type of: arthropod

Encyclopedia: Trilobite