n.
- The inner lining of the fourth stomach of calves and other young ruminants.
- A dried extract made from the stomach lining of a ruminant, used in cheesemaking to curdle milk.
- See rennin.
[Middle English, probably from Old English *rynet.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.