: 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
Doctors diagnosed Schimmel with a very rare type of brain cancer, pineal parenchymal tumors of intermediate differentiation (PPTID).
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Wendy Grossman Kantor, People.com, 20 Mar. 2025
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
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Wendy Grossman Kantor, People.com, 20 Mar. 2025
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
Cite this Entry
“Pineal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pineal. Accessed 31 Oct. 2025.
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