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单词 femic
释义

femic

/ˈfɛmɪk/
Geology
adjective
Designating a primary category of igneous rocks whose chemical composition can be expressed in terms of a group of standard minerals which are relatively rich in iron and magnesium and poor in aluminium and silicon; of or relating to such rocks and their associated minerals. Contrasted with salic.
  • The classification was devised by the American geologists W. Cross, J. P. Iddings, L. V. Pirsson, and H. S. Washington..

Origin

Early 20th century. From fe- (in ferro-) + m- + -ic: see quot. 1902.

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更新时间:2024/9/21 22:33:19