Pronunciation: (PIH-nee-ul ...)
A tiny organ in the cerebrum that produces melatonin. Also called pineal body and pineal organ.
Source: NCI Dictionary of Cancer Terms
Caption: 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.Date last modified: 2010-10-21