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 WordNet Dictionary | |||
| Definition: | [n] used in some classifications; includes the orders Xiphosura and Eurypterida | ||
| Synonyms: | class Merostomata | ||
| See Also: | arthropod, Chelicerata, Eurypterida, order Eurypterida, order Xiphosura, superclass Chelicerata, Xiphosura | ||
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| Webster's 1913 Dictionary | |||
| Definition: | \Mer`o*stom"a*ta\, n. pl. [NL., fr. Gr. ? thigh + ?,
-?, mouth.] (Zo["o]l.)
A class of Arthropoda, allied to the Crustacea. It includes
the trilobites, Eurypteroidea, and Limuloidea. All are
extinct except the horseshoe crabs of the last group. See
{Limulus}.
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