horseshoe crab

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Related to Book gill: pedicel, Malpighian tubules

horseshoe crab

n.
Any of various marine arthropods of the order Xiphosurida, especially Limulus polyphemus of eastern North America, having a large rounded body and a stiff pointed tail. Also called king crab, limulus.

horseshoe crab

n
(Animals) 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

horse′shoe crab′


n.
any of several large marine arthropods of the order Xiphosura, esp. Limulus polyphemus, of E North American shores, having a stiff tail and brown carapace curved like a horseshoe. Also called king crab.
[1765–75]

horse·shoe crab

(hôrs′sho͞o′)
Any of various marine arthropods that have a large rounded shell that covers the body, two large compound eyes on the shell, and a stiff pointed tail. Horseshoe crabs are not in fact crabs, but belong to an ancient order of arthropods related to the spiders and extinct trilobites.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.horseshoe crab - large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tailhorseshoe crab - 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; a living fossil related to the wood louse
arthropod - invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
genus Limulus, Limulus - type genus of the family Limulidae
References in periodicals archive ?
In this book Gill presents David Hume's moral philosophy as the conclusion of a debate over the question of whether human beings are naturally inclined towards good or evil.
Last but not least, Select Couture, a highly skilled dressmaker, who can assist you in your spring wedding plans, making first class outfits for the bride and her bridesmaids, a waistecoat for the groom, outfits for the proud parents, or book Gill to make you that special dress for Christmas 2001.
Third, we placed dye under the carapace at distinct locations, including the gnathobases, the lateral slits, the left and right sides of the prosoma above the pusher legs, and the book gills, to observe the movement and expulsion of the dye.