plural noun
Tho·​rac·​i·​ca | \-sə̇kə\

Definition of Thoracica 

: a division of Cirripedia including barnacles that have six thoracic segments usually bearing six pairs of cirri

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History and Etymology for Thoracica

New Latin, from thoracica, neuter plural of thoracicus thoracic, from Late Greek thōrakikos

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obstinately defiant of authority

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