from The Century Dictionary.
- A name of the gymnoblastic hydroid hydrozoans, which are not sheathed, that is, have no gonangia and no hydrothecæ: a synonym of Gymnoblastea (which see).
from the GNU version of the Collaborative International Dictionary of English.
- noun plural (Zoöl.) A division of Hydroidea in which the zooids are naked, or not inclosed in a capsule. See
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