noun
coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes
• Syn: ↑class Hydrozoa
• Hypernyms: ↑class
• Member Holonyms: ↑Cnidaria, ↑phylum Cnidaria, ↑Coelenterata, ↑phylum Coelenterata
• Member Meronyms:
Useful english dictionary. 2012.