Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A mixture of black manganese oxide minerals.
from The Century Dictionary.
- noun A hydrous oxid of manganese occurring in smooth botryoidal and stalactitic forms and massive, and having a color iron-black to steel-gray.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A hydrous oxide of manganese, occurring in smooth, botryoidal forms, and massive, and having an iron-black or steel-gray color.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Any hard, black
hydrous manganese oxide with variable amounts ofbarium andpotassium .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a mineral consisting of hydrated basic oxide of manganese and barium; a source of manganese
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[Greek psīlos, bare + Greek melās, melan-, black.]
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Examples
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Like iron ores, manganese ores consist principally of the oxides of manganese (pyrolusite, psilomelane, manganite, wad, and others), and rarely the carbonate of manganese (rhodochrosite).
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Manganese occurs mainly as black oxide (MnO_ {2}) in the mineral pyrolusite; and, in a less pure form, in psilomelane and wad.
A Text-book of Assaying: For the Use of Those Connected with Mines. Cornelius Beringer 1886
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Attributively, this on slattern, and i was amiidae to antipasto out of saphead to new phoner on psilomelane spray.
Rational Review 2009
fbharjo commented on the word psilomelane
philomelane a smooth black like charcoal
January 16, 2007