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Plumbago   Listen
Plumbago

noun
1.
Used as a lubricant and as a moderator in nuclear reactors.  Synonyms: black lead, graphite.
2.
Any plumbaginaceous plant of the genus Plumbago.



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"Plumbago" Quotes from Famous Books



... alluvion along the water courses. Much of this region abounds with minerals of various descriptions. Lead, iron, coal, gypsum, manganese, zinc, antimony, cobalt, ochre of various kinds, common salt, nitre, plumbago, porphyry, jasper, chalcedony, buhrstone, marble, and freestone, of various qualities. The lead and iron ore are literally exhaustless, and of the richest quality. To say there is probably iron ore enough in this ...
— A New Guide for Emigrants to the West • J. M. Peck

... that they would be late for breakfast; and they hurried back to the tumble-down house with its pointless porch and unpruned hedge of plumbago and pink geraniums where the Wellands were installed for the winter. Mr. Welland's sensitive domesticity shrank from the discomforts of the slovenly southern hotel, and at immense expense, and in face of almost insuperable difficulties, Mrs. ...
— The Age of Innocence • Edith Wharton

... solid at the ordinary temperature, presenting the appearance of dark-grey or purple spangles, possessing a high degree of metallic lustre. It somewhat resembles plumbago, with which it is sometimes diluted, particularly when it is fine. Operators should endeavor to secure the larger crystals. It melts at 224.6 deg., forming a brown or nearly black liquid. It boils at about 356 deg., and emits a very ...
— American Handbook of the Daguerrotype • Samuel D. Humphrey



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