The British English spelling of deoxidization; the process of removing oxygen or reducing oxidation.
From deoxidise + -ation (British spelling with -ise instead of -ize). This is the standard British variant of deoxidization used in UK chemistry terminology.
The difference between 'deoxidisation' and 'deoxidization' shows how British and American English split their chemistry vocabulary—it's the same chemistry, just spelled with traditional British -s- instead of American -z-.
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