Etymology

pygidium

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Today it means: The caudal plate of trilobites, crustacea, and certain insects. Full definition →

New Latin pygidium
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The story

  1. New Latin · borrowed frompygidium
  2. English todaypygidium

Borrowed from New Latin pygidium, By surface analysis, pygo- + -idium.

Etymology from Wiktionary, CC BY-SA 4.0.