Resembling or having the characteristics of anthracite coal.
From anthracite + -itious (Latin -itius, an adjectival suffix). This rare term emerged in geological and mineralogical contexts to describe substances that mimic anthracite's properties.
Geologists use this word to identify mysterious black rocks that look like coal but aren't—it's a way of saying 'this looks coaly, but let's test it before we get excited about a coal discovery.'
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