basement membrane

n.
A thin, delicate layer of connective tissue underlying the epithelium of many organs. Also called basement lamina.

n

The delicate, PAS-positive, noncellular membrane on which the epithelium is seated.

(bās'mənt)
n.

A thin, delicate layer of connective tissue underlying the epithelium of many organs. Also called basilemma.

The delicate extracellular supporting layer of mucopolysaccharides and proteins underlying all epithelia.

• b. m. dystrophy — see refractory ulcer.
• b. m. zone — the area corresponding to the dermoepithelial junction, which stains with periodic acid–Schiff. It consists of the basal cell plasma membrane, the lamina lucida, the basal lamina and the sub-basal lamina fibrous components.