Definitions

1. noun

A hormone or chemical that induces a specific physiological response, such as the release of another hormone.

“The chalone that regulates the release of thyroid hormone is a vital component of the body’s endocrine system.”

2. noun

A substance that inhibits the growth of something, especially a microorganism or a tumor.

“The antibiotic has a chalone effect on the bacteria, preventing them from multiplying.”