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Gigantostraca

plural noun Gi·gan·tos·tra·ca \ (ˌ)jīˌgan‧ˈtästrə̇kə , jə̇ˌg- \
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Definition of Gigantostraca

: a group of arthropods comprising the eurypteroids and sometimes related forms including the xiphosurans — compare merostomata
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gigantostracan

\¦jīˌgan‧¦tästrə̇kən; jī¦g-, jə̇¦g-\ adjective or noun
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gigantostracous

\-kəs\ adjective

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Origin and Etymology of gigantostraca

New Latin, from gigant- + -ostraca

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