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gummite

[guhm-ahyt] /ˈgʌm aɪt/
noun, Mineralogy
1.
a yellow to red alteration product of pitchblende and a minor ore of uranium, having a greasy luster and occurring in gumlike masses.
Origin
1865-1870
1865-70; orig. German Gummit. See gum1, -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for gum mite

gummite

/ˈɡʌmaɪt/
noun
1.
an orange or yellowish amorphous secondary mineral consisting of hydrated uranium oxides
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for gum mite

gummite

mixture of natural uranium oxides, representing the final oxidation and hydration stages of uraninite, that usually occurs as dense masses and crusts in many of the known uraninite localities. It varies widely in physical properties, appearance, and chemical composition; it usually contains oxides of lead and thorium and large amounts of water. Gummite, named in reference to the gumlike appearance of some varieties, is related to well-defined uranium oxides as limonite and wad are to iron and manganese oxides.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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