zygomatic arch

WordReference Random House Unabridged Dictionary of American English © 2026

zy′gomat′ic arch′, [Anat.]

1. Anatomy the bony arch at the outer border of the eye socket, formed by the union of the cheekbone and the zygomatic process of the temporal bone. See diag. under skull. 

• 1815–25

Collins Concise English Dictionary © HarperCollins Publishers::

zygomatic arch noun

1. the slender arch of bone that forms a bridge between the cheekbone and the temporal bone on each side of the skull of mammals
   Also called: zygoma