Psilomelane
[sai'lɔmilein]
解釋/意思:
(noun.) a mineral consisting of hydrated basic oxide of manganese and barium; a source of manganese.
班森編輯--From WordNet
解釋/意思:
(n.) A hydrous oxide of manganese, occurring in smooth, botryoidal forms, and massive, and having an iron-black or steel-gray color.
伊莱扎錄入