shellfish Meaning, Definition & Usage

  1. noun meat of edible aquatic invertebrate with a shell (especially a mollusk or crustacean)
  2. noun invertebrate having a soft unsegmented body usually enclosed in a shell
    mollusk; mollusc.

WordNet


Shell"fish` noun
Definitions
  1. (Zoöl.) Any aquatic animal whose external covering consists of a shell, either testaceous, as in oysters, clams, and other mollusks, or crustaceous, as in lobsters and crabs.

Webster 1913