What is another word for active coal?
Pronunciation: [ˈaktɪv kˈə͡ʊl] (IPA) 
Active coal, also known as activated charcoal, is a versatile material with a wide range of applications. It is made by heating charcoal to very high temperatures, which increases its surface area and makes it very porous -- hence the term "activated." This gives it a variety of properties that make it useful for everything from filtering water to absorbing toxins in the body. There are a number of synonyms for active coal, including activated carbon, activated charcoal, activated carbon black, and activated carbon powder. All of these terms refer to the same substance, which is widely used in a variety of commercial and industrial applications.
