secretion
nounA mineral deposit formed in a fissure or cavity by growth inward from the walls: contrasted with concretion, which grows outward from a nucleus.
In physiology.
In animal physiology, the process of preparing and separating substances by glandular activity.
In vegetable physiology, the process by which substances are separated from the sap of vegetables.
A substance or product secreted, or elaborated and emitted.
