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parietal eye

noun

  1. Zoology. a median outgrowth of the diencephalon anterior to the pineal apparatus, having visual adaptations in many anamniotes and lizards.


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Word History and Origins

Origin of parietal eye1

First recorded in 1885–90
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Example Sentences

In other words, the parietal eye can not be differentiated from any other tubercle except by its position.

It is claimed that most, if not all, trilobites possessed a median or parietal eye on the glabella.

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parietal cellparietal lobe