Examples from the Web for membranous
An order of Insects (comprising Bees, Ants, &c.) characterised by the possession of four membranous wings.The Ancient Life History of the Earth|Henry Alleyne Nicholson
The second glume is membranous, ovate-oblong, obtuse, prominently 9-nerved.
The second glume is as long as the third, membranous, 5-nerved (rarely 3- to 7-nerved), silkily hairy.
The membranous bag itself contains a similar fluid, the endolymph.A Practical Physiology|Albert F. Blaisdell
The veil is membranous and forms a persistent ring on the stem.The Mushroom, Edible and Otherwise|M. E. Hard
British Dictionary definitions for membranous
membraneous (mɛmˈbreɪnɪəs) or membranaceous (ˌmɛmbrəˈneɪʃəs)
Word Origin and History for membranous
1590s, from Middle French membraneux (16c.), from membrane, from Latin membrana (see membrane).