Word Of The Whelk.

Mollusc or US Mollusk n any of various invertebrates having a soft unsegmented body and often a shell, secreted by a fold of skin (the mantle). The group includes gastropods (slugs, snails, etc.), bivalves (clams, mussels, etc.) , and cephalopods (squid, octopuses, etc. )  ORIG via NL from L molluscus, from mollis soft.