calycozoa

from The Century Dictionary.

• noun An order of discophorous hydrozoans, the lucernarian acalephs: so called because of their cup-shape, having the umbrella or disk without a velum, pedunculated aborally, and capable of attachment at the aboral pole.

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

• noun plural (Zoöl.) A group of acalephs of which Lucernaria is the type. The body is cup-shaped with eight marginal lobes bearing clavate tentacles. An aboral sucker serves for attachment. The interior is divided into four large compartments. See lucernarida.