- any of a group of corticosteroid hormones, synthesized by the adrenal cortex, that regulate the excretion or reabsorption of sodium and potassium by the kidneys, salivary glands, and sweat glands.
- any of various natural or synthetic drugs having mineralocorticoid activity.
- any corticosteroid that controls electrolyte and water balance, esp by promoting retention of sodium by the kidney tubules
