I.a little skin or membrane.
I. Lit.: “membranula, quae sub cute calvariam cingit,” Cels. 8, 4: “oculi,” membrane of the eye, id. 7, 7, 13. —
II. Transf.
A. A parchment: “iisque imperes, ut sumant membranulam,” Cic. Att. 4, 4, b, 1.—
B. Plur., an instrument or document written on parchment: “quae membranulis meā manu scriptis continebuntur,” Dig. 32, 102 prooem.