anthracite
noun /ˈænθrəsaɪt/
/ˈænθrəsaɪt/
[uncountable]- a very hard type of coal that burns slowly without producing a lot of smoke or flames
无烟煤 词源late 16th cent. (denoting a gem described by Pliny and said to resemble coals, supposedly hydrophane, a type of opal): from Greek anthrakitēs, from anthrax, anthrak- ‘coal’.