WordReference Random House Learner's Dictionary of American English © 2014
ˈhorse•shoe ˈcrab, n. [countable]
Invertebratesa large marine arthropod having a brown covering curved like a horseshoe and a stiff tail.
Collins Concise English Dictionary © HarperCollins Publishers::
horseshoe crab n
- any marine chelicerate arthropod of the genus Limulus, of North America and Asia, having a rounded heavily armoured body with a long pointed tail: class Merostomata
Also called: king crab
'horseshoe crab' also found in these entries: