has part has part has_part characteristic of part of has modifier abnormal neurocranium morphology abnormal zygomatic arch morphology MPheno.ontology MP:0004469 any structural anomaly of the bony arch in vertebrates that extends along the side or front of the skull beneath the eye socket and is formed by the temporal process of the zygomatic bone and the zygomatic process of the temporal bone abnormal zygoma morphology abnormal malar arch morphology morphology abnormal zygomatic arch