Definition of Hydrozoa in English:

Hydrozoa

Syllabification: Hy·dro·zo·a
Pronunciation: /ˌhīdrəˈzōə
 
/
Zoology
  • A class of coelenterates that includes hydras and Portuguese men-of-war. Many of them are colonial, and some kinds have both polypoid and medusoid phases.
    More example sentences
    • The groups Hydrozoa, Scyphozoa and Cubozoa all are generally characterized as having polyps and medusae (although minor lineages have lost medusae and in some cases polyps).
    • Another feature that is quite common in Hydrozoa but not typical of Scyphozoa is colonial organization.
    • However, Hydra is not typical of the Hydrozoa as a whole.

Origin

modern Latin (plural), from hydro- 'water' + Greek zōion 'animal'.

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