plural noun
Gi·​gan·​tos·​tra·​ca | \ (ˌ)jīˌgan‧ˈtästrə̇kə, jə̇ˌg-\

Definition of Gigantostraca

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

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Other Words from Gigantostraca

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

History and Etymology for Gigantostraca

New Latin, from gigant- + -ostraca

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