psilomelane
[ sahy-lom-uh-leyn ]
/ saɪˈlɒm əˌleɪn /
noun
a common mineral consisting of a mixture of pyrolusite and other oxides of manganese, usually found in black, rounded masses: an ore of manganese.
Origin of psilomelane
1825–35; < Greek
psīló(s) bare, smooth +
mélan, neuter of
mélas black
Words nearby psilomelane
psid,
psig,
psilanthropism,
psilocin,
psilocybin,
psilomelane,
psilosis,
psis,
psittacine,
psittacinite,
psittacism
Example sentences from the Web for psilomelane
As an ore of manganese it is much less abundant than pyrolusite or psilomelane.
British Dictionary definitions for psilomelane
psilomelane
/ (sɪˈlɒmɪˌleɪn) /
noun
a common black to grey secondary mineral consisting of hydrated basic oxide of manganese and barium: a source of manganese. Formula: BaMn 9 O 16 (OH) 4
Also called: romanicite
Word Origin for psilomelane
C19: from Greek
psilos bare +
melas black