epistolographic
/ɪˌpɪstələˈɡrafɪk/ /ɪˌpɪst(ə)ləˈɡrafɪk/adjective
Used in the writing of letters, specifically designating the demotic script of ancient Egypt; compare demotic and enchorial (now rare ).
Origin
Mid 17th century; earliest use found in Theophilus Gale (1628–1679), ejected minister and theologian. From (i) post-classical Latin epistolographicus.