(anatomy) A gland that secretes milk for suckling an infant or offspring.

An exocrine gland which secretes a clear fluid known as pre-ejaculate or Cowper’s fluid (colloquially known as “pre-cum”) which is generated upon sexual arousal.

Any specialized gland in some fishes and amphibians that secretes a mucus-like substance containing venomous or acrid material.

The bulbourethral gland.

a specialized gland, located near the eyes or nose of certain marine animals that secretes a liquid having a high salt content; it enables the animal to drink seawater without having to eliminate the excess salt through the kidneys

(anatomy) The adrenal gland, which is located just above the kidney in humans.

(anatomy) Any gland that secretes hormones directly into the bloodstream; especially the endocrine gland

A secretory organ, at the base of a bird's tail, that secretes the oil used in preening.

sweat gland

(anatomy) Any of several coiled, tubular glands that extrudes part of the cytoplasm as a secretion.