Adjective
without blood vessels
Source: WordNetA few structures (such as cartilage and the lens of the eye) do not contain blood vessels and are labeled avascular. Source: Internet
A later terrestrial adaptation took place with retention of the delicate, avascular sexual stage, the gametophyte, within the tissues of the vascular sporophyte. Source: Internet
Due to this the lack of connective tissue surrounding the parabronchi and adjacent parabronchial lumen, they exchange blood capillaries or avascular epithelial plates. Source: Internet