pineal gland

(PIH-nee-ul ...) Speaker

A tiny organ in the cerebrum that produces melatonin. Also called pineal body and pineal organ.

Anatomy of the inside of the brain, showing the pineal and pituitary glands, optic nerve, ventricles (with cerebrospinal fluid shown in blue), and other parts of the brain

Figure

Anatomy of the inside of the brain, showing the pineal and pituitary glands, optic nerve, ventricles (with cerebrospinal fluid shown in blue), and other parts of the brain.