mollusc

/ˈmɒləsk/

Etymology

Borrowed from French mollusque, from New Latin Mollusca (phylum name), from Latin molluscus (“thin-shelled”), from mollis (“soft”).

noun

  1. A soft-bodied invertebrate of the phylum Mollusca, typically with a hard shell of one or more pieces.“bivalve molluscs”
  2. A weak-willed person.