membrānācĕus and -cĭus, a, um, adj. [membrana], of skin or membrane, skinny, membranaceous (post-Aug.).
I Lit.: vespertilio, cui membranaceae pinnae uni, Plin. 10, 61, 81, § 168: PVGILLARES, of parchment , Inscr. Grut. 174, 7.—
II Like a skin or membrane : quibusdam cortex membranaceus, ut viti, arundini, Plin. 16, 31, 55, § 126.