Definitions

1. adjective

relating to or obtained from milk or lactic acid, especially in the process of fermentation

“The lactic acid in the yogurt is a result of bacterial fermentation.”

2. noun

an acid found in milk and other dairy products, produced by bacterial fermentation

“Lactic acid is a key component in the production of cheese.”

3. noun

a feeling of weariness or fatigue, especially as a result of strenuous exercise

“After running a marathon, she felt a strong sense of lactic acid in her legs.”