顱ろ頂ちょう眼がん

noun

parietal eye; third eye; pineal eye

Anatomical term for a photosensitive organ on the top of the head in some reptiles, amphibians, and fish. Not to be confused with the mystical 'third eye' concept, though the term is sometimes used in that context.

• トカゲの顱ろ頂ちょう眼がんは光ひかりを感かん知ちする器き官かんだ。

  The lizard's parietal eye is an organ that senses light.

• 化か石せきから、古こ代だいの爬は虫ちゅう類るいにも顱ろ頂ちょう眼がんがあったことがわかる。

  Fossils show that ancient reptiles also had a parietal eye.