- a relating to or made of or similar to a membrane
- s characterized by formation of a membrane (or something resembling a membrane)
- This membranous film of life, teeming with millions of different kinds of organisms, is so thin it cannot be seen edgewise when viewed from a space shuttle.
- Into this membranous setting, Tancredi is symbolically born, wobbling to life to face his first crisis.
- That meant an inflammation of the brain and its membranous envelope.