Secretion

(se-hre’-shun) \jecernere, to secrete].I. The act of secreting or forming from materials furnished by the blood a certain substance which is either eliminated from the body or is used in carrying on special functions. 2. The substance secreted. S., External, aS. thrown out upon the external or internal surface of the body. S., Internal, a S. that is not thrown out upon a surface, but is absorbed into the blood. 573