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Glite Dictionary
pineal eye

pineal eye

9.9
A small organ that senses light on top of the head in some lizards and other animals
  • noun
  • /ˈpɪniəl aɪ/
  • Specialized
translation icon : ojo pineal
  • The pineal eye helps some reptiles detect changes in light.

Examples

  • Some lizards have a pineal eye on top of their heads that helps regulate their circadian rhythms.

  • Scientists have studied the pineal eye to understand its role in the evolution of vision.

  • The pineal eye is capable of detecting changes in light intensity, aiding some reptiles in thermal regulation.

  • Many species of lizards possess a pineal eye.

  • Some reptiles use their pineal eye to detect changes in light and temperature.

  • The pineal eye allows certain animals to sense their environment, even without traditional vision.

  • In some species, the pineal eye helps regulate their circadian rhythms by responding to sunlight.

Synonyms

eye
vspineal eye
∞ 1.0

A part of the head that detects light and lets you see

is a simpler organ on the top of the head giving basic light sensing
third eye
vspineal eye
  • Specialized
9.8

A small part on top of the head in some reptiles that senses changes in light

functions as a primitive visual organ that gives basic image information

Surface Forms

pineal eye singular
pineal eyes plural

Morphology

pineal + eye

The meaning is directly compositional: 'pineal' specifies relation to the pineal gland and 'eye' denotes a light-detecting organ, so together they denote an eye associated with the pineal region. Although the term is technical and uncommon, its semantics are predictable from the constituents rather than idiomatic.

Etymology

Pineal eye gets its name from a small gland called the pineal, which looks like a 'pine cone' and was once thought to be a 'third eye' on the head. Because this tiny organ can sense light in some animals, the name pineal eye now means a simple, light-sensitive eye on the top of the head.