nerve gas

nerve gas, any of several poison gases intended for military use, e.g., tabun, sarin, soman, and VX. Nerve gases were first developed by Germany during World War II but were not used at that time. These gases generally cause death by asphyxiation, often preceded by such symptoms as blurred vision, excessive salivation, and convulsions. Physiologically, the toxic effect of nerve gases arises because they inactivate the enzyme cholinesterase, which normally controls the transmission of nerve impulses; the impulses continue without control, causing breakdown of respiration and other body functions. Atropine is an effective antidote against most nerve gases. See also chemical warfare.

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nerve gas

Weapon of chemical warfare that affects the transmission of nerve impulses through the nervous system. The organophosphorus nerve agents Tabun, Sarin, and Soman were developed by Germany during World War II but not used. They and a newer agent, VX, were produced in huge quantities by the U.S. and Soviet Union during the Cold War; their stockpiling and use during war are now banned by the Chemical Weapons Convention of 1993. A single droplet of VX or Sarin, if inhaled or in contact with the skin, can be absorbed into the bloodstream and paralyze the nervous system, leading to respiratory failure and immediate death. Sarin was used in 1995 in a lethal attack in the Tokyo subways by members of AUM Shinrikyo.

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nerve gas

(esp in chemical warfare) any of various poisonous gases that have a paralysing effect on the central nervous system that can be fatal

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nerve gas [′nərv ′gas]

(chemistry)

Chemical agent which is absorbed into the body by breathing, by ingestion, or through the skin, and affects the nervous and respiratory systems and various body functions; an example is isopropylphosphonofluoridate.