pyrolusite
[ pahy-ruh-loo-sahyt, pahy-rol-yuh-sahyt ]
/ ˌpaɪ rəˈlu saɪt, paɪˈrɒl yəˌsaɪt /
noun
a common mineral, manganese dioxide, MnO2, the principal ore of manganese, used in various manufactures, as a decolorizer of brown or green tints in glass, and as a depolarizer in dry-cell batteries.
Words nearby pyrolusite
pyrokinesis,
pyroligneous,
pyroligneous acid,
pyroligneous alcohol,
pyrolize,
pyrolusite,
pyrolyse,
pyrolysis,
pyromagnetic,
pyromancy,
pyromania
Example sentences from the Web for pyrolusite
British Dictionary definitions for pyrolusite
pyrolusite
/ (ˌpaɪrəʊˈluːsaɪt) /
noun
a blackish fibrous or soft powdery mineral consisting of manganese dioxide in tetragonal crystalline form. It occurs in association with other manganese ores and is an important source of manganese. Formula: MnO 2
Word Origin for pyrolusite
C19: from
pyro- + Greek
lousis a washing +
-ite
1, from its use in purifying glass