from the GNU version of the Collaborative International Dictionary of English
- n.pl. The hydroid or naked-eyed medusæ. See hydroidea.
from The Century Dictionary and Cyclopedia
- The naked-eyed or gymnophthalmous medusæ; the Hydromedusæ proper, as distinguished from the Acraspeda: so called from their muscular velum.
Sorry, no etymologies found.