cranium

Etymology

It is inherited from Middle English craneum,^[2][3][4][5] borrowed from Medieval Latin crānium,^{[3][4][5][6][7]} from Ancient Greek κρανίον (krāníon, “skull, upper part of the head”).^{[4][8][9][10]} The Greek word is related to κάρα (kárā, “head”) and poetic κράς (krás, “head”),^[4][10] and Klein thinks it probably derives from the latter.^[10] Etymonline and the American Heritage Dictionary trace the group to Proto-Indo-European *ker- (“horn, head”),^[4][5] and Hoad and Dictionary.com connect it with κέρας (kéras, “horn”), Latin cornū (“horn”) and horn.^[8][11] Klein compares cerebrum (“brain”).^[10]

Earliest recorded meaning

The skull: craneum, probably before 1425, in a translation of Chauliac's Grande Chirurgie: "a bone þat is called craneum".^[2][3] The OED's first record is much later, from 1543,^[9] and Hoad and Collins likewise date the word to the 16th century.^[8][12]

Semantic evolution

In the strict sense it means the bones enclosing the brain, as distinct from those of the face and jaws, which is the use in B. Traheron's translation of Vigo (1543).^[9][4] Sir Thomas Browne tried an English form, crany,^[4] and Johnson (1755) defined the word as "the skull", with a quotation on wounds from Wiseman's Surgery.^[13] A wider sense, all the bones of the head, is recorded from 1842, in J. C. Prichard's Natural History of Man.^[9] The humorous use for the head itself is old, from 1647, in N. Ward's Simple Cobler of Aggawam.^[9][6] The combining form cranio- gave craniology in the 19th century,^[8] and the adjective cranial dates from 1800 in Barnhart,^[3] but Hoad gives the 18th century.^[8]

Timeline

• before 1425 – craneum, the skull.^[2][3]
• 1543 – the bones that enclose the brain, the brainpan.^[9]
• 1647 – humorously, the head.^[9]
• 1842 – the bones of the whole head, the skull.^[9]

Meanings

Noun

1. The skull of a vertebrate.^[12][7][9]
2. Specifically, the part of the skull that encloses the brain; the brainpan.^[12][7][9]
3. (humorous) The head: Mind your cranium on that low beam.^[9][6]

Word family

• chondrocranium
• cranial
• craniate
• cranio-
• endocranium
• epicranium

Related words

• cerebrum
• cerebral
• horn
• migraine
• megrim
• pericranium
• carrot

References

1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c Kurath, Hans; Kuhn, Sherman M.; Lewis, Robert E., eds. (1952–2001), Middle English Dictionary, Ann Arbor: University of Michigan Press; online edition ed. Frances McSparran et al. (2000–2018)
3. ^ a b c d e Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
4. ^ a b c d e f g Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
5. ^ a b c The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
6. ^ a b c Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
7. ^ a b c Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
8. ^ a b c d e Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
9. ^ a b c d e f g h i j k Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
10. ^ a b c d Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
11. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
12. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins
13. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.