Etymologically
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galactic

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Pronunciation

  • /ɡəˈlæktɪk/[1]

Etymology

It is borrowed from Ancient Greek γαλακτικός (galaktikós, “milky”),[2][3][4][5] through Late Latin galacticus in the sense "of the Milky Way",[6][7] from γάλα (gála, “milk”), genitive γάλακτος (gálaktos),[4][2] which is probably related to Latin lac (“milk”).[2][4] In its first, chemical sense it follows French galactique, recorded in 1782 in acide galactique;[2] in the astronomical sense it follows galaxy, and the OED compares New Latin galacticus, used so in 1754.[2] The Oxford Dictionary of English and the SOED instead form it from a variant of the Greek word for the galaxy with the suffix -ic.[8][9]

Earliest recorded meaning

In chemistry, relating to milk, in galactic acid, an old name for lactic acid: 1788, in Nicholson's translation of Fourcroy's Elements.[2]

Semantic evolution

The milk sense, now rare, was soon overtaken by the astronomical one: of or relating to the Milky Way, from 1834 according to the OED and MWU,[2][7] or 1839 according to Etymonline.[6] The word also came to mean "of or relating to any galaxy" (Etymonline dates the modern sense from 1849).[2][6] In the 20th century it took extended senses: illustrious, full of celebrities (1902), and vast or enormous (1960).[2][7]

Timeline

  • 1788 – in chemistry, relating to milk (galactic acid).[2]
  • 1834 – of or relating to the Milky Way.[2][7]
  • 1839 – of the Milky Way, according to Etymonline.[6]
  • 1849 – of or relating to the Galaxy, in the modern scientific sense.[6]
  • 1902 – illustrious, featuring many celebrities.[2]
  • 1960 – vast, enormous.[2]

Meanings

Adjective

  1. Of or relating to a galaxy, especially the Milky Way: the galactic plane.[3][7][2]
  2. (informal) Extremely great; huge: The project ran up a galactic bill.[7][2]
  3. (rare) Of or relating to milk.[3][2]

Word family

  • extragalactic
  • intergalactic
  • intragalactic
  • nongalactic
  • galactic year

References

  1. ^ 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 Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  3. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins
  4. ^ a b c Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
  5. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
  6. ^ a b c d e Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  7. ^ a b c d e f Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  8. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
  9. ^ Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press