- any invertebrate of the phylum Mollusca, typically having a calcareous shell of one, two, or more pieces that wholly or partly enclose the soft, unsegmented body, including the chitons, snails, bivalves, squids, and octopuses.
Origin of mollusk
Examples from the Web for mollusks
Historical Examples of mollusks
If Tartlet complains, it is because he does not like mollusks!Godfrey Morgan
The Mollusks and Brachiopods would afford us examples too numerous to mention.Illogical Geology
George McCready Price
Among the mollusks we must note the evolution of the cephalopods.
Sponges, echinoderms, brachiopods, and mollusks were abundant.
The reason why some mollusks have thus lost their shells is clear enough.The Evolutionist at Large
1783, mollusque (modern spelling from 1839), from French mollusque, from Modern Latin Mollusca (see Mollusca), the phylum name. Related: Molluscuous; molluscan.
- Any of numerous invertebrate animals of the phylum Mollusca, usually living in water and often having a hard outer shell. They have a muscular foot, a well-developed circulatory and nervous system, and often complex eyes. Mollusks include gastropods (snails and shellfish), slugs, octopuses, squids, and the extinct ammonites. Mollusks appear in the fossil record in the early Cambrian Period, but it is not known from what group they evolved.