Plumbaginous

Plum·bag'i·nous adjective Resembling plumbago; consisting of, or containing, plumbago; as, a plumbaginous slate.
Found on http://www.encyclo.co.uk/webster/P/110

Plumbaginous

• (a.) Resembling plumbago; consisting of, or containing, plumbago; as, a plumbaginous slate.
Found on http://thinkexist.com/dictionary/meaning/plumbaginous/
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