Definition

1. Noun:
   • A toxic gaseous substance: "Poison gas" refers specifically to a gas that is poisonous when inhaled or when it comes into contact with the skin or eyes. Its primary historical and practical association is with use as a chemical weapon in warfare.

Usage

• The term "poison gas" is used as a non-count noun to refer to the substance in general (e.g., ) or as a count noun when referring to types or instances of it (e.g., ). It is most commonly discussed in historical, military, and disarmament contexts.

Examples

• Noun:
  • The treaty banned the production and use of poison gas.
  • Soldiers were issued masks for protection against poison gas.
  • Mustard gas is a notorious type of poison gas used in World War I.

Advanced Usage

• "deploy poison gas": to use or release poison gas in a military operation.
  • The regime was accused of deploying poison gas against civilian populations.
• "victim of poison gas": a person harmed or killed by exposure to poison gas.
  • The hospital treated dozens of victims of poison gas.

Variants and Related Words

• Chemical weapon (n): A broader term for munitions or devices that use toxic chemicals, including but not limited to poison gas, to cause death or harm.
  • The stockpile included both chemical weapons and conventional explosives.
• Nerve agent (n): A specific, typically man-made, class of poison gas that disrupts the nervous system (e.g., sarin, VX).
  • The attack was carried out using a military-grade nerve agent.
• Tear gas (n): A chemical compound that causes severe eye and respiratory pain, often used for riot control. It is a type of irritant gas but is often distinguished from lethal "poison gas."
  • Police dispersed the crowd with tear gas.

Synonyms

• Toxic gas: A more general, clinical term for any gas that is poisonous.
• Chemical agent: A formal term often used in military and political contexts.

Related Phrases

• Poison gas attack (n phrase): A military strike or assault employing poison gas.
  • The international community condemned the poison gas attack.
• Poison gas canister (n phrase): A container designed to hold and release poison gas.
  • Archaeologists unearthed old poison gas canisters from the battlefield.

Notes

• The term "poison gas" carries strong connotations of inhumanity and is associated with the horrors of 20th-century warfare, particularly World War I. Its use is now prohibited under international law by treaties such as the Chemical Weapons Convention.

Noun

1. a gas that is poisonous to breath or contact; used in chemical warfare