pineal eye pineal body • pineal gland · · · Info · Definitions · Synonyms · Characters · · pineal eye · · Text Common · · Latin · · Scripts 10 · · Length 4 · · Syllables Definitions · · · (noun) a sensory structure capable of light reception located on the dorsal side of the diencephalon in various reptiles. Synonyms: third eye, pineal eye. · · Noun Definition 1 Synonyms · · · third eye · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E p latin small letter p U+0070 y latin small letter y U+0079