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.