Lewis & Short

membrānācĕus and -cĭus, a, um, adj. [membrana], of skin or membrane, skinny, membranaceous (post-Aug.).

  1. I. Lit.: vespertilio, cui membranaceae pinnae uni, Plin. 10, 61, 81, § 168: PVGILLARES, of parchment, Inscr. Grut. 174, 7.
  2. II. Like a skin or membrane: quibusdam cortex membranaceus, ut viti, arundini, Plin. 16, 31, 55, § 126.