pineal gland

noun

1. a small, cone-shaped endocrine organ in the posterior forebrain, secreting melatonin and involved in biorhythms and gonadal development.

pineal gland

noun

1. a pea-sized organ in the brain, situated beneath the posterior part of the corpus callosum, that secretes melatonin into the bloodstream Technical namesepiphysisepiphysis cerebri

pineal gland

1. A small gland located near the brain and primarily involved in the production and secretion of the hormone melatonin, which regulates circadian rhythms in many animals, including humans.

Word History and Origins

Origin of pineal gland¹

First recorded in 1705–15

Example Sentences

During the same stage the pineal gland grows into a sack-like body, springing from the roof of the thalamencephalon, fig. 1b, pn.

From Project Gutenberg

At its side also a deep constriction is being formed in it, immediately behind the pineal gland.

From Project Gutenberg

He grabbed the axe he'd left there and swung it against the nerve-stem where it entered the pineal gland.

From Project Gutenberg

He felt no remorse, but a great sadness, a sense of tragedy as he stepped around the pool and closed the door of the pineal gland.

From Project Gutenberg

Strings of tiny green bulbs guided the path toward the pineal gland, the citadel of The Brain.

From Project Gutenberg