adventitious membrane

noun

: a membrane connecting parts not usually connected or of a different texture from the ordinary connection

Word History

First Known Use

1743, in the meaning defined above

The Ultimate Dicitonary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now