Pyrolite is a term used in geology to describe a type of rock formation that contains ultramafic minerals such as olivine, clinopyroxene, and orthopyroxene. The term is commonly used in planetary science when studying the composition of the Earth's mantle and other planetary bodies such as Mars and the Moon. However, there are several synonyms for pyrolite, including harzburgite, dunite, and lherzolite. These terms describe similar rock formations that also contain ultramafic minerals. Understanding the different synonyms of pyrolite is important for geologists and planetary scientists in order to accurately describe and study these unique rock formations.