A kind of coal; an ingredient of coal (see quots.).
单词 | θ6575 |
释义 | the world > the earth > minerals > types of mineral > hydrocarbon minerals > [noun] > coal > constituents of (4) clarain1919 A kind of coal; an ingredient of coal (see quots.). maceral1935 Any of the microscopic structural constituents of coal. vitrinite1935 One of the three major kinds of maceral that go to make up humic coal, rich in oxygen and characteristic of vitrain. lithotype1957 Geology. A macroscopically visible constituent of coal distinguished by its physical characterisitics; a macroscopically distinguishable variety of… |
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