The Collaborative International Dictionary of English v.0.48:

Squamozygomatic \Squa`mo*zyg`o*mat"ic\
   (skw[=a]`m[-o]*z[i^]g`[-o]*m[a^]t"[i^]k), a. (Anat.)
   Of or pertaining to both the squamosal and zygomatic bones;
   -- applied to a bone, or a center of ossification, in some
   fetal skulls. -- n. A squamozygomatic bone.
   [1913 Webster]