vivisection

noun

viv·​i·​sec·​tion ˌvi-və-ˈsek-shən How to pronounce vivisection (audio)
ˈvi-və-ˌsek-
1
: the cutting of or operation on a living animal usually for physiological or pathological investigation
broadly : animal experimentation especially if considered to cause distress to the subject
2
: minute or pitiless examination or criticism
vivisectional
ˌvi-və-ˈsek-sh(ə-)nəl
 How to pronounce vivisection (audio)
adjective
vivisectionist noun

Did you know?

Vivisection includes the Latin root sect, meaning "cut". The Greek physician Galen, who lived during the 2nd century A.D., practiced vivisection on live monkeys and dogs to learn such things as the role of the spinal cord in muscle activity and whether veins and arteries carry air or blood; his findings formed the basis of medical practice for more than a thousand years. Vivisection continues to be used in drug and medical research today, but often in secret, since it makes most people very uncomfortable and some groups are violently opposed to it.

Examples of vivisection in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In lab research, one potential concern is performing live dissections, once known as vivisection, without anesthetics or analgesics. Bob Fischer, The Conversation, 4 Apr. 2025 There certainly are other critiques of Trumpian corruption to be seen on Broadway this season, but few speak so eloquently as Mamet’s vivisection from 1983. Greg Evans, Deadline, 31 Mar. 2025 The Dangers of Animal Experimentation—for Doctors Livia Gershon Nineteenth-century opponents of vivisection warned that the practice could make researchers and physicians callous toward all living creatures. Matthew Wills, JSTOR Daily, 16 May 2018 Unit 731 is also believed to have performed vivisections and frozen prisoners to death in tests of endurance. Mari Yamaguchi, USA TODAY, 24 July 2023 See All Example Sentences for vivisection

Word History

Etymology

Latin vivus + English section

First Known Use

1707, in the meaning defined at sense 1

Time Traveler
The first known use of vivisection was in 1707

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Cite this Entry

“Vivisection.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vivisection. Accessed 16 Apr. 2025.

Kids Definition

vivisection

noun
vivi·​sec·​tion
ˌviv-ə-ˈsek-shən
: the operating or experimenting on a living animal for scientific or medical study

Medical Definition

vivisection

noun
vivi·​sec·​tion ˌviv-ə-ˈsek-shən, ˈviv-ə-ˌ How to pronounce vivisection (audio)
: the cutting of or operation on a living animal usually for physiological or pathological investigation
broadly : animal experimentation especially if considered to cause distress or result in injury or death to the subject
vivisect verb
vivisectional adjective
Last Updated: - Updated example sentences
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