pineal eye

pineal eye

n.

See third eye.

---

pineal eye  (pn-l, pn-l)

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.

Thesaurus

Noun

1.

pineal eye - a sensory structure capable of light reception located on the dorsal side of the diencephalon in various reptiles third eye sense organ, sensory receptor, receptor - an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation betweenbrain, diencephalon, interbrain, thalmencephalon - the posterior division of the forebrain; connects the cerebral hemispheres with the mesencephalon