Warty-back
Pronunciation : Wart"y-back`
Part of Speech : n.
Definition : Defn: An American fresh-water mussel (Quadrula pustulosa). Its shell is used in making buttons.
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