zygomatic arch

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The bony arch in vertebrates that extends along the side or front of the skull beneath the eye socket and that is formed by the zygomatic bone and the zygomatic process of the temporal bone.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun anatomy An arch formed by the zygomatic process of temporal bone and the temporal process of the zygomatic bone.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the slender arch formed by the temporal process of the cheekbone that bridges to the zygomatic process of the temporal bone