dictionary help| Hydra | medical dictionary |
<organism>
Genus of freshwater coelenterates (cnidarians). They are small, solitary and only exist in the polyp form, which is a radially symmetrical cylinder that is attached to the substratum at one end and has a mouth surrounded by tentacles at the other. They have considerable powers of regeneration and have been used in studies on positional information in morphogenesis.
This entry appears with permission from the Dictionary of Cell and Molecular Biology
(11 Mar 2008)
Hyde, James, Hyde's disease, hydnocarpus oil, hydr- < Prev | Next > hydracetin, hydrachnid, hydracid
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