cerebrum

Etymology

It is borrowed from Latin cerebrum (“brain”),^{[2][3][4][5][6]} a word recorded from Plautus on, with the derivative cerebellum (“brain”).^[7] Barnhart and Klein reconstruct an earlier Latin *keras-rom or *kerēs-rom,^[4][8] while de Vaan gives Proto-Italic *kerasro-, from Proto-Indo-European *ḱerh₂-s-ro- (“thing in the head”).^[7] Etymonline and the American Heritage Dictionary trace it to the root *ker- (“horn; head”),^[3][9] also the source of Ancient Greek κάρα (kárā, “head”) and κέρας (kéras, “horn”),^[7][4][8] and of Old High German hirni (“brain”), Old Norse hjarni (“brain”) and Dutch hersenen (“brain”).^[4][8] Horn and cranium belong to the same family.^[4][8][10]

Earliest recorded meaning

The brain proper, the large front part of the brain: 1615, in H. Crooke's Mikrokosmographia.^{[2][11][4][12]} Etymonline dates the word to the 1610s, with the sense "the brain".^[3]

Semantic evolution

In Latin the word meant the brain and also the understanding.^[3] In English it named the convoluted front mass of the brain,^[2] which Collins describes as two hemispheres joined by a band of fibres, linked in humans to thought, emotion and personality.^[6] Merriam-Webster Unabridged records the use for the brain as a whole, which it says is now chiefly figurative or affected, and an extension in zoology to the main nerve ganglion of an invertebrate.^[12][6] The adjective cerebral is recorded from 1816.^[4]

Timeline

• 1615 – the brain proper, the anterior and largest part of the brain.^{[2][11][4][12]}

Meanings

Noun

1. The large front part of the brain of vertebrates, made up of two hemispheres; in humans, the part linked with intellect, emotion and voluntary activity.^{[6][12][2][5]}
2. The brain as a whole, now chiefly in a figurative or affected use.^[6][12]
3. (zoology) The main ganglion of the head in certain invertebrates.^[6][12]

Word family

• cerebral
• cerebritis
• cerebro-
• cerebr-
• cerebroid

Related words

• cerebellum
• cranium
• horn
• cervical
• cheer

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ a b c d e f g h Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
5. ^ a b Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
6. ^ a b c d e f Collins English Dictionary (2023), Glasgow: HarperCollins
7. ^ a b c de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
8. ^ a b c d Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
9. ^ The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
10. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
11. ^ a b Kay, Christian; Roberts, Jane; Samuels, Michael; Wotherspoon, Irené, eds. (2009), Historical Thesaurus of the Oxford English Dictionary, Oxford: Oxford University Press; online edition (2024)
12. ^ a b c d e f Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster