- an outgrowth of the pineal gland that forms an eyelike structure on the top of the head in certain cold-blooded vertebrates
WordReference Random House Unabridged Dictionary of American English © 2026
pin′eal eye′,
- Zoologyan eyelike structure that develops from the pineal apparatus in certain cold-blooded vertebrates. Also called third eye.
- 1885–90
Collins Concise English Dictionary © HarperCollins Publishers::
pineal eye n
'pineal eye' also found in these entries (note: many are not synonyms or translations):