What does avascularity mean?
Avascularity refers to the absence of blood vessels in a tissue, organ, or region of the body. It is the noun form corresponding to the adjective "avascular," combining the negative prefix "a-" (without) with "vascular" (relating to vessels). In medicine, avascularity is a clinically significant property: some tissues are avascular by design, such as cartilage, the cornea, and the lens of the eye, while others may lose their blood supply through disease or injury. Because blood delivers oxygen, nutrients, and immune cells, avascular tissues heal slowly and are vulnerable to degeneration — a fact central to understanding conditions like osteonecrosis and certain cartilage injuries. Surgeons and radiologists also assess avascularity when evaluating grafts, tumors, and fracture healing. The word is formal and technical, appearing mainly in medical literature, anatomy textbooks, and clinical reports rather than everyday conversation.
nounThe condition of lacking blood vessels; in medicine, the state of a tissue or area that is not supplied by blood vessels.
- The anatomical or pathological absence of blood vessels in a tissue or region.
"The surgeon noted the complete avascularity of the cartilage, which explains its limited capacity to heal."
"Because of the avascularity of the cornea, it remains transparent and is an ideal site for transplantation."
"MRI revealed a zone of avascularity at the femoral head, raising concern for early osteonecrosis."
Rarely pluralized, since avascularity is usually treated as an uncountable property; a plural would appear only when referring to distinct instances across tissues or specimens.
"The histology report documented multiple avascularities within the sampled graft regions."
Cartilage lives without a single blood vessel — and that built-in avascularity is exactly why it heals so slowly when damaged.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of avascularity
Avascularity derives from the adjective "avascular," formed from the Greek-derived prefix "a-" meaning "without" and Latin "vascularis," from "vasculum" (small vessel), diminutive of "vas" (vessel). The word entered English as medical terminology alongside other vas- terms such as vascular, vascularity, and vasculature. Its cognates share the same Latin root for vessel, including vasodilation and vasopressin.
Related word forms
How avascularity is actually used
A technical term used almost exclusively in medical and anatomical contexts; rare in general prose. Often paired with modifiers such as "complete" or "relative."
Easily confused with avascularity
Necrosis is the death of tissue, whereas avascularity is merely the absence of blood supply, which may or may not lead to tissue death.