pineal

adjective pi·ne·al \ˈpī-nē-əl, pī-ˈ\

Definition of PINEAL

: of, relating to, or secreted by the pineal gland <a pineal tumor> <the pineal hormone melatonin>

French pinéal, from Middle French, from Latin pinea pinecone, from feminine of pineus of pine, from pinus

First Known Use: 1681

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