The arch formed by the malar bone and the zygomatic process of the temporal bone.
"A Practical Physiology" by Albert F. Blaisdell
The face is long, moderately broad, and the zygomatic arches are seldom prominent.
"The Wild Tribes of Davao District, Mindanao" by Fay-Cooper Cole
Zygomatic arch of skull complete.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10" by Various
The cheekbones and zygomatic arch are prominent, and a degree of prognathism is prevalent.
"In the Andamans and Nicobars" by C. Boden Kloss
Specimens from Bedrock have zygomatic arches that are heavy anteriorly.
"Geographic Variation in the Pocket Gopher, Thomys bottae, in Colorado" by Phillip M. Youngman
As yet there is no clear evidence that reduction of the zygomatic arch is of adaptive value.
"Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz" by John M. Legler
The zygomatic arch is complete, but there is no downward process as in the Sloths.
"The Cambridge Natural History, Vol X., Mammalia" by Frank Evers Beddard
Moreover, the zygomatic arches of the skull are reduced to mere threads.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 6" by Various