Search Result for "psilomelane": 
Wordnet 3.0

NOUN (1)

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



The Collaborative International Dictionary of English v.0.48:

Psilomelane \Psi*lom"e*lane\, n. [Gr. ? bare + ?, ?, black.]
   (Min.)
   A hydrous oxide of manganese, occurring in smooth, botryoidal
   forms, and massive, and having an iron-black or steel-gray
   color.
   [1913 Webster]


WordNet (r) 3.0 (2006):

psilomelane
    n 1: a mineral consisting of hydrated basic oxide of manganese
         and barium; a source of manganese