Top-shell
Pronunciation : Top"-shell`
Part of Speech : n.
Definition : Defn: Any one of numerous species of marine top_shaped shells of the genus Thochus, or family Trochid?.
(Zo?l.)
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