Rhizostomata
Pronunciation : Rhi`zo*stom"a*ta
Part of Speech : n.pl.
Etymology : [NL., fr. Gr. (Zo?l.)
Definition : Defn: A suborder of Medus? which includes very large species without marginal tentacles, but having large mouth lobes closely united at the edges. See Illust. in Appendix.
Source : Webster's Unabridged Dictionary, 1913