Etymologically
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orbital

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Pronunciation

  • UK: /ɔː.bɪt.əl/, /ɔː.bɪt.l̩/[1]
  • US: /ɔɹ.bət.l̩/[1]

Etymology

It was first borrowed from Middle French orbital (“of the orbit of the eye”), from orbite (the source of orbit) and the suffix -al; the French adjective is recorded in 1533 in os orbital, in the passage that the first English quotation translates.[2] Later uses come either from medieval or scientific Medieval Latin orbitālis or were formed afresh from English orbit + -al.[2][3][4][5] The Latin adjective is recorded from about 1325 in a British source, meaning "cyclic".[2] The noun orbit goes back to Latin orbita (“wheel track, path of a celestial body”), from orbis (“circle, orb”).[2]

Earliest recorded meaning

Of or near the orbit of the eye, the eye socket: about 1541, in R. Copland's translation of Guy de Chauliac's surgery.[2] Etymonline dates it to the 1540s,[3] and the Shorter Oxford to the mid 16th century.[4]

Semantic evolution

The word followed the senses of orbit: after the eye socket it was used of the path of a heavenly body, from 1839 in Etymonline[3] and 1846 in the OED.[2] In 1932 R. S. Mulliken used orbital as a noun for the pattern of electron density around an atomic nucleus.[2][6] From 1933 British English used it of a road or railway encircling a large town, a sense that became a noun (an orbital) by 1970.[2][7]

Timeline

  • 1541 – of the orbit of the eye.[2][3]
  • 1839 – of the orbit of a heavenly body.[3]
  • 1846 – of or moving in an orbit (OED).[2]
  • 1932 – noun, an electron orbital.[2][6]
  • 1933 – British, of a road or railway encircling a town.[2]
  • 1970 – noun, an orbital road or railway.[2]

Meanings

Adjective

  1. Of, relating to, or moving in an orbit, especially that of a planet or satellite: the orbital period of a moon.[7][6][2]
  2. (anatomy) Of or near the eye socket.[6][2]
  3. (British) Of a motorway or other road, or a railway: circling a large city.[7][2]

Noun

  1. (physics, chemistry) The region around an atomic nucleus where an electron is likely to be found, described by a wave function.[7][6][2]
  2. (British) An orbital road or railway.[7][2]

Word family

  • anteorbital
  • preorbital
  • postorbital
  • superorbital
  • supraorbital
  • suborbital
  • interorbital
  • transorbital

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 Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  4. ^ a b Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
  5. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
  6. ^ a b c d e Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  7. ^ a b c d e Collins English Dictionary (2023), Glasgow: HarperCollins