pineal gland
/ˈpɪniəl ɡlænd/
noun
Origin
Latin
pinea — pine cone
Overview
Meaning Now
- A small, pea-shaped endocrine gland in the brain of most vertebrates that produces the hormone melatonin, which regulates sleep-wake cycles.
Literal older meaning
gland resembling a pine cone
Language path
Latin → Middle French → English
Earliest form
glande pinéale
Earliest period
17th century
Journey
The term was popularized by René Descartes, who famously described the pineal gland as the 'seat of the soul' in his 17th-century work 'Treatise of Man', believing it was the point of interaction between the physical body and the non-physical mind.
Evolution
- Latin
pinea
“pine cone”
- Middle French
pinéal
“like a pine cone”
Adjectival formation based on the shape of the gland.
- 17th Century French
glande pinéale
“pineal gland”
Coined by René Descartes in his anatomical studies.
- Modern English
pineal gland
“pineal gland”
Standardized medical term.
Connections
Word parts
pine-
root
pine tree or pine cone
-al
suffix
pertaining to
gland
root
secreting organ
Related across languages
French
glande pinéale
pineal gland
Spanish
glándula pineal
pineal gland
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External references use DefinedTerm semantics.