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spell·check·er | \ ˈspel-ˌche-kər 
\
\variants:
or spell-checker
plural spellcheckers or spell-checkers
Definition of spellchecker
: a computer program or function (as in a word processor) that identifies possible misspellings in a block of text by comparing the text with a database of accepted spellings
— called also spell-check, spelling checker
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The first known use of spellchecker was in 1981
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