Definitions:

1. a large edible crab of northern Pacific waters especially along the coasts of Alaska and Japan or its meat noun
   • King crab fishing can be dangerous.
2. a large spider crab of Europe or its meat noun
   • We enjoyed a plate of king crab in the harbor.
3. a less common name for the horseshoe crab, a large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tail noun
   • King crabs are used in medical research.

Synonyms:

• horseshoe crab