: a colorless pungent poisonous gas HCl that fumes in moist air and yields hydrochloric acid when dissolved in water
Example Sentences
Recent Examples on the WebToxic gases: Volcanoes also release toxic gasses, such as carbon dioxide, carbon monoxide, sulfur dioxide, and hydrogen chloride. Maya Wei-haas, National Geographic, 20 Oct. 2019
Word History
First Known Use
1869, in the meaning defined above
Medical Definition
hydrogen chloride
noun
: a colorless pungent poisonous gas HCl that fumes in moist air and yields hydrochloric acid when dissolved in water