Definitions

from The Century Dictionary.

  • An order or subclass of the class Hydrozoa, approximately equivalent to Hydrophora, and consisting of the eleutheroblastic, gymnoblastic, and calyptoblastic hydrozoans.

from the GNU version of the Collaborative International Dictionary of English.

  • noun plural (Zoöl.) An extensive order of Hydrozoa or Acalephæ.

Etymologies

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Examples

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