| petromyzoniformes | (n) lampreys as distinguished from hagfishes, Syn. suborder Hyperoartia, Hyperoartia, suborder Petromyzoniformes |
| Hyperoartia | ‖n. pl. [ NL. ] (Zool.) 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. [ 1913 Webster ] |