pineal recess

noun

A small anatomical space or diverticulum at the posterior of the brain's third ventricle, where it extends into the pineal gland; believed to be a key site for the hormone melatonin to enter the cerebrospinal fluid.

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Meanings

nounpineal recess (plural pineal recesses)

plural pineal recesses

  1. A small anatomical space or diverticulum at the posterior of the brain's third ventricle, where it extends into the pineal gland; believed to be a key site for the hormone melatonin to enter the cerebrospinal fluid.

Origin

From pineal + recess.

Full word history & related roots →
Cite this entry
APA

pineal recess. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/pineal%20recess

MLA

“pineal recess.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/pineal%20recess. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “pineal recess,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/pineal%20recess.

Source: pineal recess on Wiktionary, CC BY-SA 4.0.