What does avascular mean?
"Avascular" is a technical adjective meaning "without blood vessels." It is used chiefly in medicine, anatomy, and biology to describe tissues or structures that have no direct blood supply. Well-known examples include cartilage, the cornea of the eye, and tooth enamel, all of which must receive nutrients by diffusion rather than through circulating blood. The term is especially familiar to clinicians through "avascular necrosis," a serious condition in which bone tissue dies because its blood supply has been interrupted. Because avascular tissue cannot heal in the usual way, the word often carries practical significance in discussions of injury, surgery, and regeneration, even though it remains neutral and purely descriptive in tone. It derives from the Greek prefix a- ("without") combined with "vascular," from Latin vas, meaning vessel. While it rarely appears in everyday speech, understanding "avascular" is valuable for anyone reading medical reports or health literature, where it signals an important fact about how a particular tissue lives, feeds itself, and repairs damage.
adjective(Of tissue or a structure) lacking blood vessels; having no supply of blood vessels.
- (Anatomy and medicine) Of a body part or tissue, having no blood vessels or blood supply.
"The surgeon noted that the tumor had become largely avascular."
"The cornea is an avascular tissue, which helps it remain transparent to light."
"Loss of blood flow left the section of bone avascular, leading to tissue death."
Cartilage in your joints is avascular — it has no blood supply at all, which is exactly why damaged cartilage heals so painfully slowly.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of avascular
The word combines the Greek prefix a- meaning "without" with "vascular," which traces back to the Latin noun vas, meaning "vessel." It entered scientific English as anatomy and medicine developed their modern terminology, describing tissues such as cartilage and the cornea that lack a blood supply. Its cognates include "vessel" and "vase," both ultimately drawn from the same Latin root vas.
How avascular is actually used
Primarily a technical term used in medicine, anatomy, pathology, and related sciences; rare in general conversation. Often appears in clinical contexts such as 'avascular necrosis', a condition in which bone tissue dies due to loss of blood supply. Neutral connotation — descriptive rather than judgmental.
Easily confused with avascular
Vasovagal refers to a reflex involving blood vessels and the vagus nerve that causes fainting, whereas avascular simply means lacking blood vessels.