American spelling: the process or result of making something alkaline or increasing its alkalinity.
From 'alkalinize' (American spelling) + '-ation' suffix. American English standardized on '-ization' by the 19th century, influenced by Webster's dictionary decisions.
Noah Webster's spelling choices for American English nearly 200 years ago are why American scientists still write '-ization' and British ones write '-isation'—one man's dictionary choices became continental divides!
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