GNU Collaborative International Dictionary of English

Found one definition

1.       
   ‖Limulus , n.; pl. Limuli . [L., dim. of limus sidelong, askance.] (Zool.) The only existing genus of Merostomata. It includes only a few species from the East Indies, and one (Limulus polyphemus) from the Atlantic coast of North America. Called also Molucca crab, king crab, horseshoe crab, and horsefoot.
   1913 Webster