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
WordReference Random House Learner's Dictionary of American English © 2025
man•ga•nese /ˈmæŋgəˌnis, -ˌniz/USA pronunciation
n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2025- Chemistrya hard, easily broken, grayish white, metallic element used chiefly in strengthening steel.
man•ga•nese
(mang′gə nēs′, -nēz′),USA pronunciation n. [Chem.]
- Chemistrya hard, brittle, grayish-white, metallic element, an oxide of which, MnO2 (man′ganese diox′ide), is a valuable oxidizing agent: used chiefly as an alloying agent in steel to give it toughness. Symbol: Mn;
at. wt.: 54.938;
at. no.: 25;
sp. gr.: 7.2 at 20°C.
- Italian manganese, alteration of Medieval Latin magnesia magnesia
- French manganèse
- 1670–80
Collins Concise English Dictionary © HarperCollins Publishers::
'manganese' also found in these entries (note: many are not synonyms or translations):
Bessemer process
- Duralumin
- Everdur
- Heusler alloy
- Krugersdorp
- Leclanché cell
- MMT
- MN
- Manganin
- Masbate
- Minas Gerais
- Mn
- Monel metal
- Nuremberg violet
- Witwatersrand
- alabandite
- alloy steel
- aluminum bronze
- bismanol
- braunite
- cast steel
- cementite
- columbite
- desert varnish
- dioxide
- duralumin
- ferromanganese
- franklinite
- garnet
- gray manganese ore
- huebnerite
- jacobsite
- manganese bronze
- manganese spar
- manganese steel
- manganese sulfate
- manganese violet
- manganic
- manganiferous
- manganite
- manganous
- manganous sulfate
- ottrelite
- oxidate
- peroxide
- piedmontite
- psilomelane
- pyrolusite
- pyroxene
- red clay