: an extremely toxic chemical weapon C11H26NO2PS similar to sarin and tabun in action

Word History


American or British government code designation for the gas

First Known Use

1965, in the meaning defined above

Time Traveler
The first known use of VX was in 1965

Dictionary Entries Near VX

Cite this Entry

“VX.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/VX. Accessed 10 Jun. 2023.

Medical Definition


: an extremely toxic persistent chemical warfare agent C11H26NO2PS that is used especially as a nerve gas and that in large doses typically causes convulsions, loss of consciousness, paralysis, and failure of the respiratory system leading to death
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