'Gummite' definitions:

Definition of 'gummite'

(from WordNet)
noun
A gummy orange mixture of uranium oxides and silicates occurring naturally in the hydration and oxidation of pitchblende

Definition of 'Gummite'

From: GCIDE
  • Gummite \Gum"mite\, n. [So called because it occurs in rounded or flattened pieces which look like gum.] (Min.) A yellow amorphous mineral, essentially a hydrated oxide of uranium derived from the alteration of uraninite. [1913 Webster]