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hydra
hydra-headed
hydracid
hydragogue
hydralazine
hydrangea
hydrant
hydranth
hydrarch
hydrase
hydrastine
hydrastinine
hydrate
hydrated
hydraulic
hydraulic brake
hydraulic coupling
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hydrarch
hy·drarch [ h drrk ]


adjective 
Definition:
 
starting in fresh water: describes the development of a sequence of ecological stages that begins in a freshwater habitat such as a pond
[Early 20th century. <hydro- + Greek arkhē "beginning"]
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