hydrochloric : Idioms & Phrases

• noun an aqueous solution of hydrogen chloride; a strongly corrosive acid
  chlorohydric acid.
  

WordNet

• (Chem.), hydrogen chloride; a colorless, corrosive gas, HCl, of pungent, suffocating odor. It is made in great quantities in the soda process, by the action of sulphuric acid on common salt. It has a great affinity for water, and the commercial article is a strong solution of the gas in water. It is a typical acid, and is an indispensable agent in commercial and general chemical work. Called also muriatic, ∧ chlorhydric, acid.

Webster 1913