Definition of eurypterid in English:

eurypterid

Syllabification: eu·ryp·ter·id
Pronunciation: /yəˈriptərid
 
/

noun

  • An extinct marine arthropod of a group occurring in the Paleozoic era. They are related to horseshoe crabs and resemble large scorpions with a terminal pair of paddle-shaped swimming appendages.
    • Subclass Eurypterida, class Merostomata, subphylum Chelicerata
    More example sentences
    • Important fossil groups are the trilobites, a large group of Palaeozoic marine arthropods of uncertain affinity, and the eurypterids, Palaeozoic marine forms related to the arachnids.
    • Dr Selden said the Megarachne, a giant eurypterid or sea scorpion, is closely related to a creature called Woodwardopterus, from the Carboniferous Period, found in Scotland and with relatives in South Africa.
    • The most remarkable example is the three-dimensionally preserved soft tissues of the giant conodont animal Promissum pulchrum, eurypterids and other arthropods from the Upper Ordovician Soom Shale of South Africa.

Origin

late 19th century: from modern Latin Eurypterus (genus name), from eury- + Greek pteron 'wing' + -id2.

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