: an insoluble largely polysaccharide fraction of yeast cell walls

Word History

Etymology

zym- + -osan (as in hexosan)

First Known Use

1943, in the meaning defined above

Time Traveler
The first known use of zymosan was in 1943

Browse Nearby Words

Cite this Entry

“Zymosan.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/zymosan. Accessed 7 Jul. 2026.

Medical Definition

: an insoluble largely polysaccharide fraction of yeast cell walls
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!