plumbago

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

Borrowed from Latin plumbāgō (“type of lead ore”), from plumbum (“lead”).

=Graphite.=--Graphite, plumbago, or "black lead," as it is popularly named, is found in many parts of the United States, but only a few localities produce a good commercial article; these are Ticonderoga, N.Y., which yields from six hundred to two thousand tons a year, and Chester County, Pa., which yields a small but increasing amount; a good quality is mined near Ottawa, Canada. — Commercial Geography: A Book for High Schools, Commercial Courses, and Business Colleges, Jacques W. (Jacques Wardlaw) Redway

graphite, black lead

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