Noun | 1. | Scyphozoa - coelenterates in which the polyp stage is absent or at least inconspicuous: jellyfishes Cnidaria, Coelenterata, phylum Cnidaria, phylum Coelenterata - hydras; polyps; jellyfishes; sea anemones; corals scyphozoan - any of various usually free-swimming marine coelenterates having a gelatinous medusoid stage as the dominant phase of its life cycle Chrysaora, genus Chrysaora - a genus of Scyphozoa class - (biology) a taxonomic group containing one or more orders |