Adjective

(-)

Prior to the formation of Earth

*{{quote-book, 1980, Eugenio Donato, chapter=The Museum's Furnace, Textual Strategies citation

, passage=The System of the World of Laplace is the history of a preterrestrial era, the history of the world before the formation of the planet Earth, or if one prefers, of the Earth in its unity with the Sun.}}

(geology) Occurring prior to a meteorite's impact with Earth

*{{quote-book, 2003, American Geological Institute, Dictionary of Mining, Mineral, and Related Terms citation

, passage=A plagioclase glass in some chondrites and irons formed by preterrestrial impact between meteorites in space.}}