top fermentation

noun

: a violent alcoholic fermentation at a temperature of 14 to 30° C during which the yeast cells are carried to the top of the fermenting liquid used in the production of such liquors as ale, porter, and wines of high alcohol content and in distilling compare bottom fermentation

The Ultimate Dictionary 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