pineal gland | sense examples, Usage and Definition from wordnet dictionary online

Noun pineal gland has 1 sense

pineal gland, pineal body, epiphysis cerebri, epiphysis - a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin
--₁ is a kind of endocrine gland, endocrine, ductless gland