- (In some reptiles and lower vertebrates) an eye-like structure on the top of the head, covered by almost transparent skin and derived from or linked to the pineal.More example sentences
- A pineal eye was present, although not usually open to the surface.
- Researchers at the University of Maryland have found that larval blind cavefish retain a functioning pineal eye that is capable of detecting light.
More definitions of pineal eyeDefinition of pineal eye in:
- The US English dictionary