Definitions

from the GNU version of the Collaborative International Dictionary of English

  • n.pl. An artificial division of gastropods, including those that have an entire aperture.

from The Century Dictionary and Cyclopedia

  • A division of pectinibranchiate gastropodous mollusks, with shells having the mouth entire, and not notched or prolonged into a siphon: opposed to Siphonostomata.
  • In Infusoria, same as Pantostomata.

Etymologies

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