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English-Thai Dictionary

pyrolusite

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Webster's 1913 Dictionary

PYROLUSITE

Pyr `o *lu "site, n. Etym: [Pyro- + Gr. (Min. )

Defn: Manganese dioxide, a mineral of an iron-black or dark steel- gray color and metallic luster, usually soft. Pyrolusite parts with its oxygen at a red heat, and is extensively used in discharging the brown and green tints of glass (whence its name ).

New American Oxford Dictionary

pyrolusite

py ro lu site |ˌpīrōˈlo͞oˌsīt ˌpaɪroʊˈlusaɪt | ▶noun a black or dark gray mineral with a metallic luster, consisting of manganese dioxide. ORIGIN early 19th cent.: from pyro- ‘fire, heat ’ + Greek lousis ‘washing ’ (because of the mineral's use in decolorizing glass ).

Oxford Dictionary

pyrolusite

pyrolusite |ˌpʌɪrə (ʊ )ˈluːsʌɪt | ▶noun [ mass noun ] a black or dark grey mineral with a metallic lustre, consisting of manganese dioxide. ORIGIN early 19th cent.: from pyro- ‘fire, heat ’ + Greek lousis ‘washing ’ (because of the mineral's use in decolorizing glass ).