Hy·per·o·ar·ti·a n. pl.  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.
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  Hyperoartia
       n : lampreys as distinguished from hagfishes [syn: Petromyzoniformes,
            suborder Petromyzoniformes, suborder Hyperoartia]