microbiology

Etymology

It is formed from English micro- + biology,^{[2][3][4][5][6]} as an international scientific word.^[7] The OED compares French microbiologie, recorded from 1883.^[2] Micro- goes back to Ancient Greek μικρός (mikrós, “small”),^[3][1] and biology to βίος (bíos, “life”) with -logy;^[3] biology itself was proposed in 1802 by Treviranus in German and by Lamarck in French.^[3]

Earliest recorded meaning

The branch of science that deals with microorganisms: 1880, in the journal Science (25 September).^[2][3][7] Barnhart dates the word to 1888, and microbiologist to 1885.^[4]

Semantic evolution

The word has kept its meaning, the study of microscopic forms of life such as bacteria, protozoa, viruses and fungi;^[7][8] the OED adds the study of the microorganisms connected with a particular disease, place or the like, usually with a defining word, as in soil microbiology.^[2] The adjective microbiological is recorded from 1897.^[4]

Timeline

• 1880 – the science of microorganisms.^[2][3][7] Barnhart dates the word to 1888.^[4]
• 1885 – microbiologist.^[4]
• 1897 – microbiological.^[4]

Meanings

Noun

1. The branch of biology that studies microorganisms such as bacteria, viruses and fungi.^[8][7][2]
2. The microorganisms of a particular place, disease or the like, or their study.^[2]

Word family

• microbiological
• microbiologically
• microbiologist

Related words

• microbe
• microorganism
• bacteriology
• biology

Usage notes

The OED notes an observation that the first i of the word is said both short and long, though it finds the short pronunciation of that syllable not otherwise recorded for this word.^[2]

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e f Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ a b c d e f Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
5. ^ Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
6. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
7. ^ a b c d e Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
8. ^ a b Collins English Dictionary (2023), Glasgow: HarperCollins