An alloy of iron and nickel, especially one occurring in meteorites or (it is thought) the core of the earth or another planet.
Early 20th century; earliest use found in Archibald Geikie (1835–1924), geologist and historian.
英汉双解词典包含464360条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。