noun
: any of several bony processes that enter into or strengthen the zygomatic arch: as
a. : a long slender process of the temporal or squamosal bone helping to form the zygomatic arch
b. : a process of the zygomatic bone articulating with the temporal bone
c. : a narrow process of the frontal bone articulating with the zygomatic bone
d. : a broad rough process of the maxilla articulating with the zygomatic bone