Relating to or characterized by handwriting, chirography, or handwritten documents; more formal or detailed version of chirographic.
Extended adjectival form from Greek 'cheir' (hand) + 'graph' (write) + -ical (relating to), common in scholarly and legal language.
The '-ical' ending makes 'chirographical' sound more formal and academic than 'chirographic'—medieval scholars used this version to sound more authoritative about document authentication.
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