plural noun Stron·gy·lo·cen·trot·i·dae \ˌstränjəlōsen‧ˈträtəˌdē\

Definition of Strongylocentrotidae

  1. :  a large and nearly cosmopolitan family of typical sea urchins (order Centrechinoidea)

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Origin and Etymology of strongylocentrotidae

New Latin, from Strongylocentrotus, type genus + -idae

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a trip made at another's expense

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