Gummite
Pronunciation : Gum"mite
Part of Speech : n.
Etymology : [So called because it occurs in rounded or flattened pieces which look like gum.] (Min.)
Definition : Defn: A yellow amorphous mineral, essentially a hydrated oxide of uranium derived from the alteration of uraninite.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder