Arsenolite is a mineral that is composed of arsenic trioxide. It is a rare mineral that is found mostly in the oxidation zone of arsenic-bearing ore deposits. If you are looking for synonyms for the word arsenolite, you may come across some scientific terms such as arsenic oxide, arsenic white, and arsenic anhydride. Other terms that may be used as synonyms for arsenolite include arsenolite sand, arsenic flour, and arsenious acid. Some people may also use the term arsenolite to refer to the crystalline form of arsenic trioxide, which is also known as arsenic glass or arsenic oxide crystal.