The Collaborative International Dictionary of English v.0.48:

Molluscoidea, including Brachiopoda and Bryozoa. Mollusca,
including Cephalopoda, Gastropoda, Pteropoda, Scaphopoda,
Lamellibranchiata or Acephala. Echinodermata, including
Holothurioidea, Echinoidea, Asterioidea, Ophiuroidea, and
Crinoidea. C[oe]lenterata, including Anthozoa or Polyps,
Ctenophora, and Hydrozoa or Acalephs. Spongiozoa or
Porifera, including the sponges.
Protozoa, including Infusoria and Rhizopoda. For
definitions, see these names in the Vocabulary.
[1913 Webster] Animalcular

The Collaborative International Dictionary of English v.0.48:

Anthozoa \An`tho*zo"a\, n. pl. [NL., fr. Gr. 'a`nqos flower + ?
   animal.] (Zool.)
   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.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Anthozoa
    n 1: a large class of sedentary marine coelenterates that
         includes sea anemones and corals; the medusoid phase is
         entirely suppressed [syn: Anthozoa, class Anthozoa,
         Actinozoa, class Actinozoa]