plural noun
Tri·​lo·​bi·​ta | \ˌtrīləˈbītə\

Definition of Trilobita 

: a division of Arthropoda that is treated as a subclass of Crustacea or made a separate class and comprises the trilobites

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History and Etymology for Trilobita

borrowed from New Latin, neuter plural formed from Trilobites, Latinization of French trilobite or German Trilobit trilobite

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obstinately defiant of authority

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