Definitions

1. noun

A colorless, pungent, and highly toxic gas used as a cleaning agent, a fertilizer, and in the manufacture of plastics and other chemicals.

“The factory used ammonia to clean the metal surfaces before painting them.”

2. noun

A compound in the urine, often indicating kidney disease or other health problems.

“Her doctor ordered a urine test to check for ammonia levels.”

3. chemistry

A compound of nitrogen, hydrogen, and oxygen (NH3), often used in chemical synthesis.

“The chemist mixed ammonia with the catalyst to speed up the reaction.”