from The Century Dictionary.
- The discoidal hydrozoans, a subclass of Hydrozoa, comprising most of the organisms known as jelly-fishes, sea-jellies, or sea-nettles.
- An order of suctorial worms, the leeches: so called from their sucking-disks. See
from the GNU version of the Collaborative International Dictionary of English.
- noun plural (Zoöl.) A division of acalephs or jellyfishes, including most of the large disklike species.
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