• (n. pl.) A suborder of Gephyrea, including those which have the body unarmed and the intestine opening anteriorly.
Si·pun`cu·la'ce·a noun plural [ New Latin , from Sipunculus , the typical genus. See Siphuncle .] (Zoology) A suborder of Gephyrea, including those which have the body unarmed and the intestine opening anteriorly.