Definition of pyrolusite in English:
pyrolusite
noun ˌpʌɪrə(ʊ)ˈluːsʌɪtˌpaɪroʊˈlusaɪt
mass nounA black or dark grey mineral with a metallic lustre, consisting of manganese dioxide.
Example sentencesExamples
- Acicular crystals and crystal aggregates of pyrolusite are found in vugs in the pegmatites of the district.
- It never occurs as a free element, but only in ores such as pyrolusite, manganite, psilomelane, and rhodochrosite.
- The ore, a mixture of ‘psilomelane’ and pyrolusite with much manganiferous limonite, contains masses of cerussite.
- Scheele produced chlorine by treating the mineral pyrolusite with hydrochloric acid (HCl).
Origin
Early 19th century: from pyro- 'fire, heat' + Greek lousis 'washing' (because of the mineral's use in decolorizing glass).
Definition of pyrolusite in US English:
pyrolusite
nounˌpīrōˈlo͞osītˌpaɪroʊˈlusaɪt
A black or dark gray mineral with a metallic luster, consisting of manganese dioxide.
Example sentencesExamples
- Acicular crystals and crystal aggregates of pyrolusite are found in vugs in the pegmatites of the district.
- The ore, a mixture of ‘psilomelane’ and pyrolusite with much manganiferous limonite, contains masses of cerussite.
- Scheele produced chlorine by treating the mineral pyrolusite with hydrochloric acid (HCl).
- It never occurs as a free element, but only in ores such as pyrolusite, manganite, psilomelane, and rhodochrosite.
Origin
Early 19th century: from pyro- ‘fire, heat’ + Greek lousis ‘washing’ (because of the mineral's use in decolorizing glass).