pineal

adjective
pi·​ne·​al | \ ˈpī-nē-əl How to pronounce pineal (audio) , pī-ˈnē- How to pronounce pineal (audio) \

Definition of pineal

: of, relating to, or secreted by the pineal gland a pineal tumor the pineal hormone melatonin

Examples of pineal in a Sentence

Recent Examples on the Web And teenagers whose pineal glands haven't yet calcified can actually travel to another time period and get stuck there, which Steve realizes is what has happened to Brianna. Jennifer Ouellette, Ars Technica, 22 Nov. 2020 This video shows a monitor lizard skull fossil fragment with both the parietal and pineal foramina visible (highlighted in yellow). Amina Khan, latimes.com, 3 Apr. 2018 What purpose the fourth eye served in addition to pineal eye is hard to say. David Grossman, Popular Mechanics, 2 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pineal.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of pineal

1681, in the meaning defined above

History and Etymology for pineal

French pinéal, from Middle French, from Latin pinea pine cone, from feminine of pineus of pine, from pinus

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Dictionary Entries Near pineal

pine after

pineal

pinealectomy

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Statistics for pineal

Cite this Entry

“Pineal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pineal. Accessed 19 Aug. 2022.

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More Definitions for pineal

pineal

adjective
pi·​ne·​al | \ ˈpī-nē-əl How to pronounce pineal (audio) , pī-ˈ How to pronounce pineal (audio) \

Medical Definition of pineal

 (Entry 1 of 2)

: of, relating to, or being the pineal gland

pineal

noun

Medical Definition of pineal (Entry 2 of 2)

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