WOLFRAMITE


Meaning of WOLFRAMITE in English

[wol.fram.ite] n [G Wolframit, fr. Wolfram] (ca. 1868): a mineral that consists of a tungstate of iron and manganese usu. of a brownish or grayish black color and slightly metallic luster, occurs in monoclinic crystals and in granular or columnar masses, and is used as a source of tungsten

Merriam-Webster English vocab.      Английский словарь Merriam Webster.