Secretion (noun)

1. The process of producing and releasing a substance, such as a hormone or enzyme, from a cell or gland.
2. The substance produced and released.

Origin:

From latin "secretio" meaning "a pouring forth".

Examples:

1. The pancreas secretes insulin.
2. The gland secretes a hormone that regulates metabolism.
3. The mucus secretion protects the lungs.
4. The liver secretes bile to help in digestion.
5. The hormone secretion helps to regulate the menstrual cycle.