"point at which a celestial body is nearest the Earth," 1590s, from Modern Latin perigeum (15c.), from Late Greek peregeion, used by Ptolemy as a noun, properly neuter of adjective perigeios "near the earth," from peri ges, from peri "near" (see peri-) + ges, genitive of gē "earth" (see Gaia). Now only of the moon, formerly used also for the corresponding point in the orbit of any celestial body. Compare apogee.
rare earth element, named by French chemist Lecoq de Boisbaudran in 1886, from holmia "holmium oxide," name of an earth identified and named in Modern Latin by the earth's discoverer, Swedish chemist Per Teodor Cleve, in 1879 from Holmia, Latin name of Stockholm. With metallic element ending -ium. Holmia was isolated from erbia, the Scandinavian earth which also yielded thulium, scandium, and ytterbium.