noun. a corticosteroid hormone that is secreted by the cortex of the adrenal gland; regulates salt (sodium and potassium) and water balance.
1. Noun, singular or mass It occurs when your adrenal glands fail to make enough cortisol and perhaps aldosterone. 2. Adjective Cortisol is one of the two hormones produced by our dogs’ adrenal glands; the other is aldosterone.