Geology a roughly spherical mass or nodule of iron ore; (also more widely) a lump of oxidized iron.
Late 17th century; earliest use found in Robert Plot (bap. 1640, d. 1696), naturalist and antiquary.
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。