Lewis & Short

hypomnēma, ătis, n., = ὑπόμνημα, a written remark, memorandum, note: in exscribendis hypomnematis, Cic. Fil. ap. Cic. Fam. 16, 21, 8 (in Cic. Att. 2, 1, 2; 15, 23; 16, 14, 4, written as Greek).