plural noun Syn·ap·ti·dae \-təˌdē\

Definition of Synaptidae

  1. :  a widely distributed family (order Apoda) of sea cucumbers lacking a respiratory tree, having the water-vascular system greatly reduced, and being mostly littoral but including some forms found in very deep waters

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Origin and Etymology of synaptidae

New Latin, from Synapta, type genus (from Greek synaptē, feminine of synaptos joined together) + -idae

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to criticize severely

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