Main Entry: Hir·u·din·ea Pronunciation: "hir-(y)&-'din-E-& Function: noun plural : a class of hermaphroditic aquatic,terrestrial, or parasitic annelid worms distinguished by a coelom nearly obliterated by connective tissue and reduced to a series of vascular sinuses, by modification of the hindmost segments into asucking disk, and by the absence of parapodia and setae
[hir-oo-din-ee-uh] 
ʊˈdɪn