plural noun Tri·dac·ni·dae \-nəˌdē\

Definition of Tridacnidae

  1. :  a small family of chiefly tropical thick-shelled marine bivalve mollusks (suborder Cardiacea) — see tridacna

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Origin and Etymology of tridacnidae

New Latin, from Tridacna, type genus + -idae

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quaintly unconventional or refined

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