mollusk

noun

mol·​lusk ˈmä-ləsk 

variants or mollusc

: any of a large phylum (Mollusca) of invertebrate animals (such as snails, clams, or squids) with a soft unsegmented body usually enclosed in a calcareous shell

broadly : shellfish

molluscan adjective

or less commonly molluskan

mə-ˈlə-skən 

mä-

Examples of mollusk in a Sentence

Recent Examples on the Web

Cultured pearls, as opposed to natural ones, are created by implanting a shell bead into a mollusk. — Stacia Datskovska, Footwear News, 16 Sep. 2026

Sher did fall short of convincing Deukmejian to sign one of his bills — a whimsical measure inspired by a Camp Fire girls and boys troop to proclaim the banana slug to be the official state mollusk. — Dan Morain, Los Angeles Times, 14 Sep. 2026

Crabs tore through fishing nets, devoured mollusks at an alarming rate and edged out the native green crab, a local soft-shell specialty. — ABC News, 2 Sep. 2026

As water moves through their gills, it is filtered for microscopic organisms that these mollusks then consume as food. — Encyclopedia Britannica, 18 Aug. 2026

Word History

Etymology

French mollusque, from New Latin Mollusca, from Latin, neuter plural of molluscus thin-shelled (of a nut), from mollis

First Known Use

1783, in the meaning defined above

Rhymes for mollusk

• mollusc

Kids Definition

mollusk

noun

mol·​lusk

variants or mollusc

ˈmäl-əsk 

: any of a large phylum of invertebrate animals (as snails, clams, and octopuses) with a soft body lacking segments and usually enclosed in a shell containing calcium

molluscan adjective

also molluskan

mə-ˈləs-kən 

mä-

Medical Definition

mollusk

noun

mol·​lusk

variants or mollusc

ˈmäl-əsk 

: any invertebrate animal of the phylum Mollusca

molluscan adjective

also molluskan

mə-ˈles-kən, mä-