Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

mustard gas

noun

Simple Definition of mustard gas

  • : a poison gas used as a weapon in a war

Full Definition of mustard gas

  1. :  an irritant vesicant oily liquid C4H8Cl2S used especially as a chemical weapon

1917

First Known Use of mustard gas

1917


Medical Dictionary

mustard gas

noun

Medical Definition of mustard gas

  1. :  an irritant oily liquid C4H8Cl2S used especially as a chemical weapon that causes blistering, attacks the eyes and lungs, and is a systemic poison—called also dichlorethyl sulfide, sulfur mustard




Learn More about mustard gas


Seen and Heard

What made you want to look up mustard gas? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 9, 2016

marked by high spirits and laughter

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

duvet kittly-benders spindrift pince-nez
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ