yperite
/ˈaɪpəraɪt/
noun
- A chemical compound used as a poison gas in warfare, also known as mustard gas, that causes severe burns and blisters.
- The production of yperite is banned under international chemical weapons treaties.
- Soldiers exposed to yperite suffered painful blisters on their skin and lungs.
- Yperite was first used as a weapon during World War I.