Definitions

1. adjective

Produced or containing lactic acid, especially in relation to the fermentation of milk or other substances.

“Cheese is made from lactic acid fermentation.”

2. noun

The acid formed by the fermentation of milk or other substances.

“Lactic acid is commonly found in yogurt.”

3. noun

A feeling of fatigue or muscle soreness after exercise, especially if it is intense or prolonged.

“The athlete experienced lactic acid after completing the marathon.”