• (n. pl.) A group of chaetopod annelids, including those that are not confined to tubes. See Chaetopoda.
Er·ran'ti·a noun plural [ New Latin , from Latin errare to wander. See Err .] (Zoology) A group of chætopod annelids, including those that are not confined to tubes. See Chætopoda . [ Written also Errantes .]