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hy•drate



Pronunciation: (hī'drāt), [key]
n., v., -drat•ed, -drat•ing.


n.
any of a class of compounds containing chemically combined water. In the case of some hydrates, as washing soda, Na2CO3·10H2O, the water is loosely held and is easily lost on heating; in others, as sulfuric acid, SO3·H2O, or H2SO4, it is strongly held as water of constitution.

v.t., v.i.
to combine chemically with water.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

hydrastishydrated
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