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单词
psilomelane
释义
WordReference Random House Unabridged Dictionary of American English © 2024
psi•lom•e•lane
(sī lom
′
ə lān′),
USA pronunciation
n.
Mineralogy
a common mineral consisting of a mixture of pyrolusite and other oxides of manganese, usually found in black, rounded masses: an ore of manganese.
Greek
psīló
(
s
) bare, smooth +
mélan,
neuter of
mélas
black
1825–35
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更新时间:2025/11/12 7:14:21