WordReference Random House Unabridged Dictionary of American English © 2025
pin′eal bod′y, 
  1. Anatomy(formerly) the pineal gland.
  • 1830–40

WordReference Random House Unabridged Dictionary of American English © 2025
pin′eal gland′, 
  1. Anatomya small, cone-shaped endocrine organ in the posterior forebrain, secreting melatonin and involved in biorhythms and gonadal development. Also called epiphysis. See diag. under brain. 
  • 1705–15

Collins Concise English Dictionary © HarperCollins Publishers::
pineal gland, pineal body
  1. a pea-sized organ in the brain, situated beneath the posterior part of the corpus callosum, that secretes melatonin into the bloodstream
    Technical names: epiphysis, epiphysis cerebri
'pineal body' also found in these entries (note: many are not synonyms or translations):
pineal - pineal gland

Forum discussions with the word(s) "pineal body" in the title:


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