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hydrogen sulfide
hydrogen sulfite
hydrogen tartrate
hydrogenase
hydrogenate
hydrogenize
hydrogenolysis
hydrogenous
hydrogeology
hydrography
hydroid
hydrokinetics
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hydrologic cycle
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hydrogeology
hy·dro·ge·o·lo·gy [ hdrō jee ólləjee ]


noun 
Definition:
 
study of water movement through rock: the branch of geology that studies the movement of subsurface water through rocks and the effect of moving water on rocks, including their erosion

hy·dro·ge·o·log·ic [ hdrō jee ə lójjik ] adjective
hy·dro·ge·o·log·i·cal adjective
hy·dro·ge·ol·o·gist [ hdrō jee ólləjist ] noun
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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