Lewis & Short

chartārĭus, a, um, adj. [charta],

  1. I. of or pertaining to paper, paper-: officinae, Plin. 18, 10, 20, § 89: calamus, App. Flor. 9.
  2. II. Subst.: chartārĭus, ii, m., a papermerchant, Diom. p. 313 P.; Inscr. Orell. 4159.
  3. III. chartārĭum, i, n., archives, Hier. adv. Ruf. 3, 6.