Thelodontidae
plural noun
Thel·o·don·ti·dae
| \ ˌtheləˈdäntəˌdē \
Definition of Thelodontidae
: a family of Devonian and Silurian ostracoderms that is included among the Heterostraci or isolated in the order Coelolepida
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Merriam-Webster unabridged
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