has part has part has_part characteristic of part of has modifier abnormal zygomaticus muscle morphology abnormal major zygomaticus muscle morphology 2017-09-25T08:14:07Z abnormal musculus zygomaticus major morphology MP:0030186 abnormal zygomaticus major muscle morphology any structural anomaly of the slender band of muscle on each side of the face that arises from the zygomatic bone, inserts into the orbicularis oris and skin at the corner of the mouth, and acts to pull the corner of the mouth upward and backward when smiling or laughing abnormal greater zygomatic muscle morphology MPheno.ontology morphology abnormal zygomaticus major muscle