Mēm'bra-nā'ceōūs or Mem-brā'ne-oūs, a.
a. [Lat. membran(e)us, membranaceus, Fr. membraneux, It. membranoso, membranaceo, Sp. membranoso.]
Sense 1. Belonging to, or resembling, a membrane; consisting of membranes; as, a membranaceous covering. Birds of prey have membranaceous stomachs, not muscular. Aristot.
Sense 2. (Bot.) Thin, like membrane, and translucent.