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Webster 1913 Edition


Psilomelane

Psi-lom′e-lane

,
Noun.
[Gr. [GREEK] bare + [GREEK], [GREEK], black.]
(Min.)
A hydrous oxide of manganese, occurring in smooth, botryoidal forms, and massive, and having an iron-black or steel-gray color.

Definition 2024


psilomelane

psilomelane

English

Noun

psilomelane (usually uncountable, plural psilomelanes)

  1. Any hard, black hydrous manganese oxide with variable amounts of barium and potassium.