n :  a compound (as Glauber's salt) formed by the union of water with some other substance
, vb, hy*drat*ed  hy*drat*ing vt  :  to cause to take up or combine with water or the elements of water vi  :  to become a hydrate .
 
 
 
Similar sounding terms:  dirty  dried  dry out  hy·dride 
 
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