Hydrozoan Definition
hīdrə-zōən
noun
Any animal of this class, as a hydroid or Portuguese man-of-war.
Webster's New World
Any of various cnidarians of the class Hydrozoa, including the hydras, hydroids, and siphonophores, which exhibit alternation of generations between the polyp and medusa stage or exist in only one or the other stage.
American Heritage
Synonyms:
adjective
Of a class (Hydrozoa) of cnidarians having a saclike body consisting of two layers of cells, and a mouth that opens directly into the body cavity.
Webster's New World
Other Word Forms of Hydrozoan
Noun
Singular:
hydrozoan
Plural:
hydrozoansOrigin of Hydrozoan
-
From New Latin Hydrozōa class name Hydra type genus hydra -zōa pl. of -zōon -zoon
From American Heritage Dictionary of the English Language, 5th Edition
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