Longman Dictionary of Contemporary English
nerve gas
noun
EXAMPLES FROM CORPUS
▪ A new form of nerve gas?
▪ And much of the liquid used to simulate nerve gas at the test site was contained by the wooden crates.
▪ And, she noted, the Pentagon was still investigating troop exposure to nerve gas before and during the ground war.
▪ The nerve gas would only be released if the incorrect code was programmed twice into the computer.
▪ The fact was he had broken a Senate tie back in 1983 and voted for the production of nerve gas.
▪ Yep, that Soviet nerve gas, all hooked up to a computerized bomb.
Wiktionary
nerve gas
n. A toxic chemical compound and banned weapon of mass destruction which, when inhaled or ingested, impairs nervous system functions, typically causing extreme physical distress and death by asphyxiation.
WordNet
nerve gas
n. a toxic gas that is inhaled or absorbed through the skin and has harmful effects on the nervous and respiratory system [syn: nerve agent]