any of a large class (Gastropoda) of mollusks having one-piece
or spiral shells
, as snails, limpets, etc., or having no shells or greatly reduced
shells, as certain slugs: most gastropods move by means of a broad
, muscular, ventral
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.