has part has part has_part characteristic of has modifier abnormal temporomandibular joint disk morphology absent temporomandibular joint disk 2017-10-27T11:56:06Z absent articular disc of temporomandibular joint absent temporomandibular articular disk absent articular disk of temporomandibular joint MP:0030331 missing the oval, biconcave, avascular fibrocartilaginous structure located between the condyle of the mandible and the mandibular (glenoid) fossa of the temporal bone; the disk provides the gliding surface for the mandibular condyle, resulting in smooth joint movement; it splits the temporomandibular joint into two synovial joint cavities, each lined by a synovial membrane, and separates translational and rotational motion absent temporomandibular joint disc absent temporomandibular joint meniscus absent TMJ disc absent temporomandibular articular disc MPheno.ontology absent TMJ disk abnormal absent disk of temporomandibular joint