Avascular necrosis

Avascular necrosis is a disease resulting from the temporary or permanent loss of the blood supply to the bones. Without blood, the bone tissue dies and causes the bone to collapse. If the process involves the bones near a joint, it often leads to collapse of the joint surface. This disease also is known as osteonecrosis, aseptic (bone) necrosis, and ischemic bone necrosis.
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Necrosis /ne·cro·sis/ pl. necro´ses [Gr.] the morphological changes indicative of cell death caused by progressive enzymatic degradation; it may [more]Avascular necrosis - Community and Resources

Condition in which poor blood supply to an area of bone leads to bone death. Also called avascular necrosis and osteonecrosis.

adjective
with no blood vessels, with a deficient blood supply
avascular necrosis = condition where tissue cells die because their supply of blood has been cut