Corals

• No alternation of generations the medusoid phase being entirely suppressed sea anemones

Wikipedia Word definitions in Wikipedia
Anthozoa is a class within the phylum Cnidaria . Unlike other cnidarians, anthozoans do not have a medusa stage in their development. Instead, they release sperm and eggs that form a planula , which attaches to some substrate on which the cnidarian grows. ...

WordNet Word definitions in WordNet
See anthozoan

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Anthozoa \An`tho*zo"a\, n. pl. [NL., fr. Gr. 'a`nqos flower + ? animal.] (Zo["o]l.) The class of the C[oe]lenterata which includes the corals and sea anemones. The three principal groups or orders are Acyonaria , Actinaria , and Madreporaria .