Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Plural form of hypostoma.

from The Century Dictionary and Cyclopedia

  • An order or suborder of fishes, confined to the eastern seas, alone represented by the family Pegasidœ, of uncertain position, supposed to be related to the mail-cheeked series of acanthopterygians. Originally written in the French form Hypostomides by Duméril.
  • A group of echinoderms.
  • Infusorians in which the mouth is inferior or ventral.
  • A superclass of extinct, fish-like vertebrates, the Ostracodermi of Cope and other writers: contrasted with Cyclostomata, the lampreys, and Gnathostomata, vertebrates with true jaws.

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