Lewis & Short

mĕmŏrĭālis, e, adj. [memoria],

  1. I. of or belonging to memory or remembrance, memorial (post-Aug.): libellus. a memoran dum-book, Suet. Caes. 56.
  2. II. Subst.
    1. A. Mĕmŏrĭālis, is, m., a historiographer Cod. Just. 12, 29, 1.
    2. B. mĕmŏrĭāle, is, n. memorial, that which keeps in remembrance: Domine, tuum, Vulg. Psa. 135, 13; Arn. in Psa. 135.
    3. C. mĕmŏrĭālia, ĭum, n. plur., memoirs, Dig. 50, 16, 44; Macr. S. 3. 6, 11.
      The title of a book by Sabinus Masurius, Gell. 6 (7), 7, 8. Sabinus in septimo memoriall, id. 4, 20, 11