||Hy`per*o*tre"ta (hī`p&etilde;r*&osl;*trē"t&adot;), n. pl. [NL., fr. Gr. "yperw`,n the palate + trhto`s perforated.] (Zoöl.) An order of marsipobranchs, including the Myxine or hagfish and the genus Bdellostoma. They have barbels around the mouth, one tooth on the palate, and a communication between the nasal aperture and the throat. See Hagfish. [Written also Hyperotreti.]