plural noun
Lin·​gu·​li·​dae | \liŋˈgyüləˌdē\

Definition of Lingulidae 

: a family of brachiopods (order Atremata) that includes the earliest recorded Lower Cambrian animal fossils and is represented by a few recent forms — see lingula

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History and Etymology for Lingulidae

New Latin, from Lingula, type genus + -idae

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obstinately defiant of authority

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