Etymologically

molecular

This is the current revision of this entry, as edited by bogdan on 16 October 2026 at 14:35. This address is a permanent link to this version.

Pronunciation

  • IPA: /məˈlɛk.jʊ.lə/ (UK); /məˈlɛk.jə.ləɹ/, /məˈlɛk.ju.ləɹ/ (US)[1]

Etymology

It is formed from molecule and -ar, or from French moléculaire or Modern Latin molecularis;[2] MWU treats it as an International Scientific Vocabulary formation.[3]

Earliest recorded meaning

Relating to or consisting of molecules: 1770 in MWU,[3] by 1815 in Etymonline, 1823 in the OED.[2][4]

Semantic evolution

Of a branch of science dealing with molecular phenomena it is from 1880,[4] and molecular biology is attested by 1950.[2] In logic and philosophy a molecular proposition, made of simpler ones, is from 1892,[4][5] and in psychology an elementary unit of behaviour from 1925.[4] Concerned with a basic level of a subject is from 1953.[4][6]

Timeline

  • 1770 – first known use.[3]
  • 1823 – in the OED.[4]
  • 1880 – of a branch of science.[4]
  • 1892 – in logic.[4]
  • 1950 – molecular biology.[2]

Modern meaning

Adjective

  1. Of, relating to or made up of molecules.
  2. Of or relating to basic structure or form.
  3. (logic) Of a sentence or formula, able to be analysed into atomic ones.

Word family

  • molecularity
  • molecularly
  • bimolecular
  • equimolecular
  • intermolecular
  • intramolecular
  • monomolecular
  • multimolecular
  • molecule
  • mole

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  3. ^ a b c Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  4. ^ a b c d e f g h Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
  5. ^ Collins English Dictionary (2023), Glasgow: HarperCollins
  6. ^ The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin