mustard gas 
noun
A colourless oily liquid whose vapour causes severe irritation and blistering of the skin, used in chemical weapons.
- Chemical formula: (ClCH2CH2)2S.
- A chemical weapon is any weapon that uses a manufactured chemical, such as sarin, mustard gas or hydrogen cyanide, to kill or injure.
- All showed traces of blister gases, the army said, a group of chemical compounds which include mustard gas.
- rhythmicity
- rhythmicize
- rhythmics
- rhythming
- rhythm instrument
- rhythmisation
- rhythmise
- rhythmist
- rhythmite
- rhythmization
- rhythmize
- rhythmless
- rhythm man
- rhythm method
- rhythmometer
- rhythmopoeia
- rhythmopoetic
- rhythmopoietic
- rhythm section
- rhythm stick
- rhythm system
- rhythmus
- rhytidectomy
- rhytidome
- Rhytina