third eye third estate • third eyelid · · · Info · Definitions · Synonyms · Characters · · third eye · · Text Common · · Latin · · Scripts 9 · · Length 3 · · 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 · · · pineal eye · · Synonym 1 Characters · · space U+0020 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079