Etymology

zygomaticus major

Today it means: A slender band of muscle on each side of the face that arises from the zygomatic bone, inserts into the orbicularis oris and skin at the corner of the mouth, and acts to pull the corner of the mouth upward and backward when smiling or laughing. Full definition →

New Latin zygomaticus major
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The story

  1. New Latin · borrowed fromzygomaticus major
  2. English todayzygomaticus major

Borrowed from New Latin zygomaticus major, clipping of mūsculus zygomaticus major (“larger zygomatic muscle”).

Etymology from Wiktionary, CC BY-SA 4.0.