Definify.com

Webster 1913 Edition


Pyrolusite

Pyrˊo-lu′site

,
Noun.
[
Pyro-
+ Gr. [GREEK] to loose, or [GREEK] a loosing.]
(Min.)
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).

Definition 2024


pyrolusite

pyrolusite

English

Noun

pyrolusite (countable and uncountable, plural pyrolusites)

  1. (mineralogy) A dark coloured mineral, consisting of manganese dioxide (MnO2), that is an important ore of manganese.