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Word of the Day Tuesday, June 9, 2026

pineal

/ˈpaɪnɪəl/ noun · British & US
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What does pineal mean?

noun

A small endocrine gland in the vertebrate brain that produces melatonin and regulates the sleep-wake cycle. It is also a term used in mysticism and spirituality to refer to a supposed seat of the soul.

Example

"The pineal gland plays a crucial role in regulating our circadian rhythms."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for pineal

Rhymes with pineal

Etymologically related