ˈmembrənəs, (ˈ)mem|brān- adjective
Etymology: Middle French membraneux, from membran- + -eux -ous
1. : of, relating to, or resembling membrane
a membranous lining
2. : thin, pliable, and often somewhat transparent
membranous leaves
3. : characterized or accompanied by the formation of a membrane or pseudomembrane
membranous croup
membranous gastritis
• mem·bra·nous·ly adverb