ĕpistŭlāris — Lewis & Short
ĕpistŭlāris (epistol-, v. epistula
chartae,letter-paper, Mart. 14, 11 in lemm.; Dig. 33, 9, 3, § 10:
colloquium,epistolary, Aug. Ep. ad Marcell. 5.—
epistularis tua,Mart. Cap. 9, § 896.—Plur.: epistulāres, ium, m., state secretaries, Cod. Th. 6, 30, 7.