LSJ
χρόνος, Gramm., pluperfect tense, D.T. 638.24, A.D. Synt. 281.6, Choerob. in Theod. 2.12 H., etc. ; without χρόνος, A.D. Adv. 124.18, EM 483.51, etc. ; ὑ. διάθεσις is f.l. for συντ. in A.D. Synt. 70.8.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)