pineal gland pineal eye • pinealism · · · Info · Definitions · Synonyms · Characters · · pineal gland · · Text Common · · Latin · · Scripts 12 · · Length 3 · · Syllables Definitions · · · (noun) a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin. Synonyms: pineal gland, pineal body, epiphysis cerebri, epiphysis. · · Noun Definition 1 Synonyms · · · pineal body · · Synonym 1 epiphysis cerebri · · Synonym 2 epiphysis · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 g latin small letter g U+0067 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