HYDROZOON
\hˌa͡ɪdɹəzˈuːn], \hˌaɪdɹəzˈuːn], \h_ˌaɪ_d_ɹ_ə_z_ˈuː_n]\
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(pl. HYDROZOA), In zool. one of a class of radiated animals, forming, with the Actinozoa, the sub-kingdom Coelenterata. The Hydrozoa are divided into four sub-classes-Hydroida, Siphonophora, Discophora, and Lucernarida. The genus Hydra may be taken as the type.
By Daniel Lyons
