has part has part has_part characteristic of part of has modifier abnormal neurocranium morphology abnormal parietal bone morphology MP:0000109 any structural anomaly of either of a pair of membranous bones of the roof of the skull located between the frontal and occipital bones that are large, curved and quadrilateral in outline, articulate with each other at the midline in the sagittal suture, and form most of the superior and lateral aspects of the cranium parietal bone dysplasia MPheno.ontology morphology abnormal tetrapod parietal bone