a steroid hormone, CHO, produced synthetically and by the adrenal cortex glands: the chief regulator of sodium, potassium, and chloride metabolism, thus controlling the body's water and electrolyte balances
Origin:
< ald(ehyde) + ster(ol) + -one
See aldosterone in American Heritage Dictionary 4
noun
A steroid hormone secreted by the adrenal cortex that regulates the salt and water balance in the body.