mollusk (US) noun
or British mollusc /ˈmɑːləsk/ plural mollusks
or British mollusc /ˈmɑːləsk/ plural mollusks
Learner's definition of MOLLUSK
[count] biology
: any one of a large group of animals (such as snails and clams) that have a soft body without a backbone and that usually live in a shell软体动物