has part has part has_part characteristic of part of has modifier abnormal ulna morphology abnormal olecranon morphology 2018-10-10T10:31:48Z abnormal elbow bony tip morphology abnormal ulnar process morphology MPheno.ontology any structural anomaly of the large bony prominence at the proximal end of the ulna which articulates with the olecranon fossa of the humerus and is palpable at the posterior aspect of the elbow; while the olecranon is an attachment site for several muscle groups including the flexor carpi ulnaris and anconeus, the major muscle attachment is that of the triceps brachii muscle abnormal olecranon process of ulna morphology MP:0030856 morphology abnormal olecranon