manganese manganese /ˈmæŋgəˌniːz/

noun

1. A hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals  ( atomic number 25 , manganese , Mn )
   a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals