plural noun Het·er·odon·ti·dae \-təˌdē\

Definition of Heterodontidae

  1. :  a family of small sharks (suborder Squaloidea) having a few recent representatives in warm parts of the Pacific and Indian oceans but known since Jurassic times, bearing two dorsal fins each armed with a spine, and having the posterior teeth arranged in a dense pavement adapted for crushing the shells of mollusks — see heterodontus

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Origin and Etymology of heterodontidae

New Latin, from Heterodontus, type genus + -idae

Seen and Heard

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feeling or affected by lethargy

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