What is definition brimstone?

Brimstone is a term often used for sulfur or sulphur, a chemical element with the symbol S and atomic number 16. It is a non-metal, abundant, and found in many minerals, such as pyrite, gypsum, and galena. Brimstone is yellow in color with a strong odor and is often associated with volcanic activity. It has many uses, including the manufacture of sulfuric acid and fertilizers, as well as in the production of rubber, matches, and gunpowder. In popular culture, "fire and brimstone" is often used to refer to punishment and hell due to its association with the Bible.