单词 | nepheline-basalt |
释义 | nepheline /nefˈə-lēn/nounA rock-forming mineral, silicate of sodium, potassium and aluminium, colourless, usu crystallizing in hexagonal prisms (also nephˈelite) ORIGIN: Gr nephelē a cloud (from the clouding effect of acid on it) nephˈelinite noun A basalt-like rock compound of nepheline and pyroxene, with no feldspar or olivine nephˈeline-basˈalt noun A basalt with nepheline instead of (or in addition to) feldspar |
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