vertebra

Etymology

It is borrowed from Latin vertebra (“joint, joint of the spine”),^{[2][3][4][5][6][7]} already in Middle English,^[5][3] from vertō (“to turn”)^{[2][3][5][8][9]} with -bra, a suffix of instruments,^{[6][8][4][10]} seen also in terebra and palpebra.^[8] Merriam-Webster Unabridged traces the suffix to Proto-Indo-European *-dhrā,^[6] and the verb goes back to *wer- (“to turn, bend”).^[4][5] Etymonline hedges the Latin derivation with "perhaps".^[4] The Latin word also gave Italian vertebra and French vertèbre,^[2] and the anglicised vertebre, from French, was in use in English from 1578.^[2]

Earliest recorded meaning

A bone of the spine: probably before 1425, in a translation of Chauliac's Grande Chirurgie,^[3] early 15th century in Etymonline.^[4] The OED has no quotation before 1615, in H. Crooke's anatomy,^[2] and the Oxford Dictionary of English and Collins also start it in the 17th century;^[11][12] Merriam-Webster Unabridged gives 1578,^[6] and Dictionary.com 1570–80.^[10]

Semantic evolution

A vertebra is etymologically a bony pivot, a bone on which others turn,^[9][13] with the spine seen as the hinge of the body.^[4] Latin used the word for a joint in general as well as a joint of the spine.^[3][2] A related Latin vertebrum was used in English from the late 14th century for the round head of the thigh bone.^[4][2] From the 1620s the vertebrae could mean the whole backbone,^[4][2] and the singular had the same meaning in a rare use from 1791.^[2] The adjectives followed later: vertebral (1681) and vertebrate (1826).^[3]

Timeline

• c. 1425 – a bone of the spine.^[3][4] The anglicised vertebre is recorded from 1578,^[2] and vertebra in the OED from 1615.^[2]
• 1620s – plural, the vertebrae, the spine.^[4][2]
• 1698 – in zoology, a segment of the arm of a brittle star.^[2][7]
• 1726 – with a term naming the region, as in cervical vertebra.^[2][7]
• 1791 – singular, the spine (rare).^[2]

Meanings

Noun

1. One of the bony segments that make up the spinal column of a vertebrate: The fall cracked a vertebra in her lower back.^[12][6][2]
2. In the plural, the spine or backbone as a whole.^[2][7]
3. (zoology) A segment of the arm of a brittle star or similar echinoderm.^[7][2]

Word family

• vertebral
• vertebrate

Related words

• vertex
• verse
• version
• vertical

Usage notes

The plural is vertebrae, also vertebras.^[12][6]

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k l m n o p q r Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e f g Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
4. ^ a b c d e f g h i j Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
5. ^ a b c d The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
6. ^ a b c d e f Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
7. ^ a b c d e Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
8. ^ a b c Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
9. ^ a b Ayto, John (2005), Word Origins: The Secret Histories of English Words from A to Z, 2nd ed., London: A & C Black
10. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
11. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
12. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins
13. ^ Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press