commentarius

commentārius ī, m (sc. liber), or commentarium, ī, n (sc. volumen)

commentor, a notebook, notes, memorandum : recita commentarium: quod de apparatibus belli fecerat, L.—Plur, memoirs, records : quos scripsit (Caesar) rerum suarum, i. e. the works upon the Gallic and civil wars : rex volvens commentarios Numae, L.