Source : Webster's Revised Unabridged Dictionary (1913)

Hyperoartia \Hy`per*o*ar"ti*a\, n. pl. [NL.] (Zo["o]l.)
   An order of marsipobranchs including the lampreys. The
   suckerlike moth contains numerous teeth; the nasal opening is
   in the middle of the head above, but it does not connect with
   the mouth. See {Cyclostoma}, and {Lamprey}.

Source : WordNet®

Hyperoartia
     n : lampreys as distinguished from hagfishes [syn: {Petromyzoniformes},
          {suborder Petromyzoniformes}, {suborder Hyperoartia}]