manganese

[ mang-guh-nees, -neez ]

/ ˈmæŋ gəˌnis, -ˌniz /

noun Chemistry.

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

1670–80; <French manganèse<Italian manganese, alteration of Medieval Latin magnesiamagnesia

Words nearby manganese

mangabey, Mangalore, Mangaluru, mangan-, manganate, manganese, manganese bronze, manganese nodule, manganese spar, manganese steel, manganese violet

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for manganese

The fact that the Rio Grande rise also harbors traces of iron and manganese was not lost on the minerals industry.
Atlantis Discovered?|Mac Margolis|May 10, 2013|DAILY BEAST
The total output of manganese in the United States in 1901 was less than 12,000 tons.
The History of Cuba, vol. 5|Willis Fletcher Johnson
As long ago as 1774, Rinman observed that steel alloyed with manganese is non-magnetic.
Inventors at Work|George Iles
Iron and manganese have, on the contrary, been greatly developed in the same period.
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7|Various

Chromium, like manganese, is very hard to reduce from its ores, owing to its great affinity for oxygen.
An Elementary Study of Chemistry|William McPherson
If they did, potassium chlorate would be a better depolarizer than manganese dioxide, instead of the other way around.
With No Strings Attached|Gordon Randall Garrett (AKA David Gordon)

British Dictionary definitions for manganese

manganese

/ (ˈmæŋɡəˌniːz) /

noun

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

Word Origin for manganese

C17: via French from Italian manganese, probably altered form of Medieval Latin magnesia

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for manganese

manganese

[ măng′gə-nēz′, -nēs′ ]

n. Symbol Mn

A brittle metallic element, having several allotropes. It is alloyed with steel to increase strength. Atomic number 25.

Scientific definitions for manganese

manganese

[ măng′gə-nēz′ ]

Mn

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.

单词	manganese
释义	manganese [ mang-guh-nees, -neez ] / ˈmæŋ gəˌnis, -ˌniz / noun Chemistry. 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 1670–80; <French manganèse<Italian manganese, alteration of Medieval Latin magnesiamagnesia Words nearby manganese mangabey, Mangalore, Mangaluru, mangan-, manganate, manganese, manganese bronze, manganese nodule, manganese spar, manganese steel, manganese violet Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for manganese The fact that the Rio Grande rise also harbors traces of iron and manganese was not lost on the minerals industry. Atlantis Discovered?\|Mac Margolis\|May 10, 2013\|DAILY BEAST The total output of manganese in the United States in 1901 was less than 12,000 tons. The History of Cuba, vol. 5\|Willis Fletcher Johnson As long ago as 1774, Rinman observed that steel alloyed with manganese is non-magnetic. Inventors at Work\|George Iles Iron and manganese have, on the contrary, been greatly developed in the same period. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7\|Various Chromium, like manganese, is very hard to reduce from its ores, owing to its great affinity for oxygen. An Elementary Study of Chemistry\|William McPherson If they did, potassium chlorate would be a better depolarizer than manganese dioxide, instead of the other way around. With No Strings Attached\|Gordon Randall Garrett (AKA David Gordon) British Dictionary definitions for manganese manganese / (ˈmæŋɡəˌniːz) / noun 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 Word Origin for manganese C17: via French from Italian manganese, probably altered form of Medieval Latin magnesia Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for manganese manganese [ măng′gə-nēz′, -nēs′ ] n. Symbol Mn A brittle metallic element, having several allotropes. It is alloyed with steel to increase strength. Atomic number 25. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for manganese manganese [ măng′gə-nēz′ ] Mn 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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