plural noun
Bran·​chi·​a·​ta | \ ˌbraŋkēˈätə, -ātə\

Definition of Branchiata

: any of several groups of animals having gills: such as
a : the Crustacea as distinguished from the tracheate arthropods
b : amphibians and fishes as distinguished from the higher vertebrates

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History and Etymology for Branchiata

New Latin, from branchi- + -ata

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