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Related to parietal eye: pineal eye
A photosensory organ located on the top of the head of certain reptiles, chiefly lizards. Also called pineal eye, third eye.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.