Any disease of a degenerative nature that affects the intervertebral disk. The disease is Monarch Disease Ontology term MONDO_0011385 (intervertebral disk degenerative disorder). Also known as: IDD, degenerative disc disease, degenerative disk disease, degenerative disorder of intervertebral disc, degenerative disorder of intervertebral disk, intervertebral Disc Degeneration, intervertebral Disc degenerative disease, intervertebral Disc degenerative disorder.