pineal-, pinea-

1. Piniform; shaped like a pine cone.
2. Pertaining to the corpus pineale (pineal gland).

A small cone-shaped organ of the brain that secretes the hormone melatonin into the bloodstream. It is one of the endocrine glands and is situated beneath the back part of the corpus callosum (the thick band of nerve fibers that connects the two hemispheres of the brain in higher mammals and allows the hemispheres to communicate).

Removal (excision) of the pineal body.

Any condition due to presumed abnormalities of pineal gland secretion.

Chief cell or parenchymatous cell of the corpus pineale; a cell of the pineal body with long processes ending in bulbous expansions.

A relatively rare pineal neoplasm characterized by large, round, or polygonal, cells and small cells that resemble lymphocytes.

A disorder of the pineal gland: A pinealopathy is an ailment or disease of the gland-like structure in the brain which is shaped like a pine cone.