pineal eye
an eyelike structure that develops from the pineal apparatus in certain cold-blooded vertebrates.
Origin of pineal eye
1- Also called third eye.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use pineal eye in a sentence
Let us turn now to the right pineal eye of Ammocœtes (Fig. 37) and see what its further structure is.
The Origin of Vertebrates | Walter Holbrook GaskellThis pineal eye has been compared in structure to the eye of Ascidians.
Stories of the Universe: Animal Life | B. LindsayFig. 141 represents a section through the head near the pineal eye.
The Origin of Vertebrates | Walter Holbrook GaskellI described to her the brain, the pineal organ in Anguis, Sphenodon's pineal eye, etc.
The Journal of a Disappointed Man | Wilhelm Nero Pilate Barbellion
British Dictionary definitions for pineal eye
an outgrowth of the pineal gland that forms an eyelike structure on the top of the head in certain cold-blooded vertebrates
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for 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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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