from the GNU version of the Collaborative International Dictionary of English
- n.pl. A group of nudibranchiate Mollusca having on the back papilliform or branched organs serving as gills.
from The Century Dictionary and Cyclopedia
- A group of nudibranchiate opisthobranchiate gastropods, having the branchiæ cylindrical, fusiform, or club-shaped, whence the name. Also Cerabranchia.
Sorry, no etymologies found.