The British spelling of the process of removing or neutralizing unwanted odors from something.
From deodorize + -ation (Latin suffix making a noun from a verb). The British spelling uses 'isation' while American English uses 'ization,' both stemming from Latin and French conventions established in the 19th century as chemistry industries grew.
British vs. American spelling differences like 'deodorisation' vs 'deodorization' trace directly to spelling reforms—American Noah Webster intentionally shortened words in his 1828 dictionary to distinguish American English from British English as a form of cultural independence.
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