Pineal
//ˈpɪnɪəl//
"Pineal" in a Sentence (3 examples)
Descartes thought that the mind and body were joined in the pineal gland.
The pineal gland secretes melatonin.
Because of its central location and its solitary nature — most structures in the brain come in pairs, but the pineal stands alone — the philosopher René Descartes concluded that the pineal is where the soul resides.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.