Pineal-eye


noun
1.
an eyelike structure that develops from the pineal apparatus in certain cold-blooded vertebrates.
noun
1.
an outgrowth of the pineal gland that forms an eyelike structure on the top of the head in certain cold-blooded vertebrates
pineal eye
(pĭn’ē-əl, pī’nē-əl)
A sensory structure capable of light reception, appearing as a spot on the top of the head in lampreys, hagfish, amphibians, and some reptiles, especially the tuatara. Pineal eyes can contain a rudimentary cornea, lens, cone cells, and retina, and are thought to be sensitive to light and dark but not to be able to form images.

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  • Pinealocyte

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  • Pinealoma

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  • Pineal stalk

    pineal stalk n. The attachment of the pineal body to the roof of the third ventricle, containing the pineal recess of the third ventricle.

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