/ ɔːˈθɒgrəfi; NAmE ɔːrˈθɑːg-/ noun
[ U ] ( formal ) the system of spelling in a language
► or·tho·graph·ic / ˌɔːθəˈgræfɪk; NAmE ˌɔːrθ-/ adjective
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WORD ORIGIN
late Middle English : via Old French and Latin from Greek orthographia , from orthos correct + -graphia writing.