perimembranous

As a noun terms

is .

As an adjective perimembranous is

(anatomy) forming a surrounding membrane.

As a noun membrane

is membrane.

As an adjective perimembranous is

(anatomy) forming a surrounding membrane.

As adjectives the difference between surrounding and perimembranous

is that surrounding is which surrounds something while perimembranous is (anatomy) forming a surrounding membrane.

As a verb surrounding

is .

As a noun surrounding

is outlaying area; area in proximity to something.