
Hydromedusa is a turtle genus in the family Chelidae, commonly known as the South American snake-necked turtles. They are quite closely related to the South American side-necked swamp turtles (Acanthochelys) and the snake-necked turtles of the Australian-Melanesian region (Chelodina), but less closely to the side-necked river turtles of South Amer...
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http://en.wikipedia.org/wiki/Hydromedusa

• (n.) Any medusa or jellyfish which is produced by budding from a hydroid. They are called also Craspedota, and naked-eyed medusae.
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http://thinkexist.com/dictionary/meaning/hydromedusa/

(from the article `cnidarian`) ...jellyfishes, for the medusa form is larger and better known than the polyp form. In hydrozoans, the polyp phase is more conspicuous than the ...
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http://www.britannica.com/eb/a-z/h/89

Origin: NL. See Hydra, and Medusa. ... <zoology> Any medusa or jellyfish which is produced by budding from a hydroid. They are called also Craspedota, and naked-eyed medusae. ... Such medusae are the reproductive zooids or gonophores, either male or female, of the hydroid from which they arise, whether they become free or remain attached to t...
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http://www.encyclo.co.uk/local/20973
Hy`dro·me·du'sa noun ;
plural Hydromedusæ . [ New Latin See
Hydra , and
Medusa .]
(Zoology) Any medusa or jellyfish which is produced by budding from a hydroid. They are called also
Craspedota , and
naked-eyed medusæ . » Such medusæ ...
Found on
http://www.encyclo.co.uk/webster/H/76

the medusa form of a hydrozoan.
Found on
https://www.infoplease.com/dictionary/hydromedusa
No exact match found.