psilomelane

名词 psilomelane:

1. a mineral consisting of hydrated basic oxide of manganese and barium; a source of manganese

psi.lom.e.lane

n.（名词）
A mixture of black manganese oxide minerals.
硬锰矿：一种黑色氧化锰矿的混合物

来源：
Greek psilos [bare]
希腊语 psilos [光秃秃的]
Greek melas melan- [black]
希腊语 melas melan- [黑色的]