dissection

Etymology

It is borrowed from Medieval Latin dissectiō, a noun of action from the Latin verb dissecō (“to cut in pieces”),^[2][3][4][5] perhaps directly borrowed from French dissection, used in the 16th century by Paré.^[2][3][6] The Shorter Oxford instead forms it from dissect and -ion, partly from those earlier words.^[7] The Latin verb is formed from dis- (“apart”) and secō (“to cut”), from Proto-Indo-European *sek- (“to cut”).^[3][8] Barnhart notes that the verb dissect, recorded from 1607, may itself be a back-formation from this noun.^[9]

Earliest recorded meaning

That which has been cut apart, a thing resulting from dissecting: the OED's first quotation is from Sidney's An Apologie for Poetrie, before 1586.^[2][7] Etymonline dates the word to the 1580s, as the operation of cutting open or separating into parts;^[3] Merriam-Webster gives 1578 for the act or process of dissecting,^[6] and Dictionary.com 1575–85.^[5]

Semantic evolution

The word quickly specialised to the methodical cutting up of an animal or plant to display its inner structure: this sense is recorded from 1605, in Bacon,^[2] and Klein credits Bacon with introducing the term,^[10] although the OED has an earlier use.^[2] In the same year it meant chemical analysis, a use that lasted until 1794.^[2] The transfer to taking anything apart for critical examination followed by 1642, in Milton.^[2][3] Johnson's 1755 entry gives only the anatomical sense, and his 1773 edition adds "nice examination" as a second one.^[11] In physical geography, from 1909, it is the breaking up of a plateau or plain by erosion.^[2][7]

Timeline

• before 1586 – that which has been dissected, in Sidney.^[2]
• 1605 – the methodical cutting up of an animal or plant, in Bacon.^[2]
• 1605 – chemical analysis (obsolete by 1794).^[2]
• 1611 – cutting apart or into pieces in general (obsolete by 1785), in Cotgrave.^[2]
• 1642 – minute critical examination of something, in Milton.^[2][3]
• 1909 – the breaking up of a flat surface by erosion.^[2]

Meanings

Noun

1. The act or process of cutting up an animal or plant to study its anatomical structure: The class watched the dissection of a frog.^[6][2][7]
2. A detailed critical analysis of something: Her dissection of the budget took up a whole chapter.^[6][2][7]
3. Something that has been dissected, or that is the result of dissecting.^[2][7]
4. (physical geography) The breaking up by erosion of a flat surface such as a plateau into hills and valleys.^[2][7]
5. (obsolete, 1605–1794) Chemical analysis.^[2][7]

Word family

• microdissection
• redissection

Related words

• dissect
• section
• bisect

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 q r s 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. ^ Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
5. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
6. ^ a b c d Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
7. ^ a b c d e f g h Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
8. ^ The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
9. ^ Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
10. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
11. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.