- Eurypterida
- nounextinct aquatic arthropods of the Paleozoic• Syn: ↑order Eurypterida• Hypernyms: ↑animal order• Member Holonyms: ↑Merostomata, ↑class Merostomata• Member Meronyms: ↑eurypterid
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\\ˌyu̇rə̇(p)ˈterədə, -u̇rə̇(-\ noun pluralUsage: capitalized: an order of aquatic Paleozoic arthropods commonly forming with the related king crabs the class Merostomata, having a cephalothorax with six pairs of limbs of which the last pair were usually shaped like paddles and a tapering abdomen of 13 segments, and including the largest known arthropods, some exceeding 6 feet in length* * *
Eurypterida /-terˈi-də/ plural nounA Palaeozoic fossil order of Arachnida, scorpion-like aquatic animals, sometimes over six feet long, with the last (sixth) pair of appendages expanded• • •Main Entry: ↑Eurypterus
Useful english dictionary. 2012.