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aquation

noun
aqua·​tion | \əˈkwāshən\
plural -s

Definition of aquation 

: the replacement by water molecules of a coordinated atom or group in a coordination complex

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History and Etymology for aquation

Latin aquation-, aquatio act of fetching water, from aquatus (past participle of aquari to bring or fetch water, from aqua water) + -ion-, -io -ion

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