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The Collaborative International Dictionary
Uran-ochre

Uran-ocher \U"ran-o`cher\, Uran-ochre \U"ran-o`chre\, n. [Cf. F. uranochre.] (Min.) (a) A yellow, earthy incrustation, consisting essentially of the oxide of uranium, but more or less impure.

Wiktionary
uran-ochre

n. (context mineralogy English) A yellow, earthy incrustation, consisting essentially of the oxide of uranium, but more or less impure.