Myzontes, mī-zon′tēz,n.pl.a class of vertebrates with an incomplete cartilaginous skull, no lower jaw, and pouch-like gills—including the lampreys and hags.—adj.andn.suctorial as the lamprey, belonging to the Myzontes. [Gr.myzōn,myzontos, pr.p. ofmyzein, to suck.]