pineal
nounEtymology From French pinéal, from Middle French, from Latin pīnea (“pine cone, pine nut”), from pīneus (“of the pine”).
1
The pineal gland.
- 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.2019, Bill Bryson, The Body: A Guide for Occupants, Black Swan (2020), page 310: