plural noun
Syn·​ap·​ti·​dae | \ -təˌdē\

Definition of Synaptidae

: 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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History and Etymology for Synaptidae

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

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concealment of treason or felony

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