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hy·dro·zo·an | \ ˌhī-drə-ˈzō-ən 
\
\Definition of hydrozoan
: any of a class (Hydrozoa) of cnidarians (such as the hydra, fire coral, and Portuguese man-of-war) that includes solitary and colonial polyps and medusae but often having the medusa stage reduced or absent and lacking nematocysts in the digestive cavity — see siphonophore
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More Definitions for hydrozoan
hydrozoan
nounhy·dro·zo·an | \ -ˈzō-ən \
\Medical Definition of hydrozoan
: any of the class Hydrozoa of coelenterates
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Time Traveler for hydrozoan
The first known use of hydrozoan was in 1877
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