(ˌ)jīˌgan.ˈtästrə̇kə, jə̇ˌg- noun plural
Usage: capitalized
Etymology: New Latin, from gigant- + -ostraca
: a group of arthropods comprising the eurypteroids and sometimes related forms including the xiphosurans — compare merostomata
• gi·gan·tos·tra·can |jīˌgan.|tästrə̇kən; jī|g-, jə̇|g- adjective or noun
• gi·gan·tos·tra·cous -kəs adjective