manganese
a hard, brittle, grayish-white, metallic element, an oxide of which, MnO2(manganese dioxide ), is a valuable oxidizing agent: used chiefly as an alloying agent in steel to give it toughness. Symbol: Mn; atomic weight: 54.938; atomic number: 25; specific gravity: 7.2 at 20°C.
Origin of manganese
1Words Nearby manganese
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use manganese in a sentence
The fact that the Rio Grande rise also harbors traces of iron and manganese was not lost on the minerals industry.
And it put forward sensitive and intelligent antenn as it sought its food thirty miles away down the coast—manganese.
Mushroom Town | Oliver OnionsThe moment they showed signs of coming his way, Edward Garden was after richer returns than manganese would yield.
Mushroom Town | Oliver OnionsWhen peroxide of manganese has been used, the manganese is also precipitated as oxide.
If the amount of manganese is more than double that of iron, the separation of the latter will take a much longer time.
Scientific American Supplement No. 299 | Various
When the amount of manganese is small, the separation of the two elements takes place very rapidly, and the results are accurate.
Scientific American Supplement No. 299 | Various
British Dictionary definitions for manganese
/ (ˈmæŋɡəˌniːz) /
a brittle greyish-white metallic element that exists in four allotropic forms, occurring principally in pyrolusite and rhodonite: used in making steel and ferromagnetic alloys. Symbol: Mn; atomic no: 25; atomic wt: 54.93805; valency: 1, 2, 3, 4, 6, or 7; relative density: 7.21–7.44; melting pt: 1246±3°C; boiling pt: 2062°C
Origin of manganese
1Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for manganese
[ măng′gə-nēz′ ]
A grayish-white, hard, brittle metallic element that occurs in several different minerals and in nodules on the ocean floor. It is used to increase the hardness and strength of steel and other important alloys. Atomic number 25; atomic weight 54.9380; melting point 1,244°C; boiling point 1,962°C; specific gravity 7.21 to 7.44; valence 1, 2, 3, 4, 6, 7. See Periodic Table.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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