Corals

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

WordNet Word definitions in WordNet
See actinozoan

Wikipedia Word definitions in Wikipedia
Actinozoa is an obsolescent term in systematic zoology , first used by Henri Marie Ducrotay de Blainville in his Manuel d'Actinologie (1834) to designate animals the organs of which were disposed radially about a centre. De Blainville included in his group ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Actinozoa \Ac"ti*no*zo"a\, n. pl. [Gr. ?, ?, ray + zw^on animal.] (Zo["o]l.) A group of C[oe]lenterata, comprising the Anthozoa and Ctenophora. The sea anemone, or actinia, is a familiar example.

Wiktionary Word definitions in Wiktionary
n. (plural of actinozoon English)