from the GNU version of the Collaborative International Dictionary of English
- n. A genus of marine Bryozoa in which the tubular cells have a centralchitinous axis and the tentacles are borne on a bilobed lophophore. It is the type of the order Pterobranchia, or Podostomata.
from The Century Dictionary and Cyclopedia
- n. The typical genus of Rhabdopleuridæ, having the tentacles confined to a pair of outgrowths of the lophophore containing each a cartilaginoid skeleton.
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