|
|
Definition of Hydrozoa
1. Noun. Coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes.
Group relationships: Cnidaria, Coelenterata, Phylum Cnidaria, Phylum Coelenterata
Member holonyms: Hydroid, Hydrozoan, Genus Hydra, Order Siphonophora, Siphonophora, Genus Sertularia, Sertularia
Generic synonyms: Class
Definition of Hydrozoa
1. n. pl. The Acalephæ; one of the classes of cœlenterates, including the Hydroidea, Discophora, and Siphonophora.
Definition of Hydrozoa
1. Noun. (biology) a large group of marine animals, of the class ''Hydrozoa'', whose life cycles contain a sexual and asexual stage ¹
¹ Source: wiktionary.com
Definition of Hydrozoa
1. hydrozoon [n] - See also: hydrozoon
Medical Definition of Hydrozoa
1.
Lexicographical Neighbors of Hydrozoa
Literary usage of Hydrozoa
Below you will find example usage of this term as found in modern and/or classical literature:
1. College zoology by Robert William Hegner (1918)
"Classification of the hydrozoa The hydrozoa may be distinguished from the ...
In classifying the hydrozoa, both the hydroids and medusae are considered. ..."
2. The Microscope and Its Revelations by William Benjamin Carpenter (1883)
"In the hydrozoa there is no separation between the digestive cavity and the ...
As most of the hydrozoa or Hydroid Polypes are essentially Microscopic ..."
3. Proceedings of the Royal Society of London by Royal Society (Great Britain) (1870)
"... in the lower shales of the Ayrshire and Lanarkshire coal-field, and an
examination of their structure determined them to belong to the hydrozoa, ..."
4. Fresh-water Biology by Henry Baldwin Ward, George Chandler Whipple (1918)
"CHAPTER XI HYDRA AND OTHER FRESH-WATER hydrozoa BY FRANK SMITH ... The fresh-water
Coelenterata are all included in the class hydrozoa, and hydra is the ..."
5. A Manual of Zoology by Richard Hertwig (1912)
"According to varying standpoints the hydrozoa can be placed either higher or
lower than the Anthozoa in the system, since in the former group two forms ..."
6. A Manual of Palaeontology for the Use of Students with a General by Henry Alleyne Nicholson (1872)
"CLASS A. hydrozoa.—The walls of the digestive sac not separated from those of
the general body-cavity, the two coinciding with one another. ..."
Other Resources:
