sea slug

noun
1.
a nudibranch.
Origin
1770-80
Examples from the web for sea slug
  • From scallop to sea slug, invertebrates have served as models of human and animal disease.
British Dictionary definitions for sea slug

sea slug

noun
1.
any of various shell-less marine gastropod molluscs, esp those of the order Nudibranchia See nudibranch
sea slug in Science
sea slug  
Any of various colorful marine gastropods of the suborder Nudibranchia, lacking a shell and gills but having fringelike projections that serve as respiratory organs. Also called nudibranch.