plural noun Pro·gan·o·chel·i·dae \prōˌganəˈkeləˌdē\

Definition of Proganochelidae

  1. :  a family of extinct Triassic turtles that are the earliest known representatives of the Thecophora

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Origin and Etymology of proganochelidae

New Latin, from Proganochelys, type genus (from 1pro- + Greek ganos brightness + chelys tortoise) + -idae — more at chelys

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feeling or affected by lethargy

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