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vĭcissĭtūdo, ĭnis, f. [vicis, I.], change, interchange, alternation, vicissitude (class.; used alike in sing. and plur.): omnium rerum vicissitudo est, Ter. Eun. 2, 2, 44: ex alio in aliud vicissitudo atque mutatio, Cic. Tusc. 5, 24, 69: in sermone communi, id. Off. 1, 37, 134: nihil vicissitudine studiorum officiorumque jucundius, id. Lael. 14, 49: eorum (generum), reciprocal influence, id. N. D. 2, 33, 84.
Plur.: dierum noctiumque, Cic. Leg. 2, 7, 16: diurnae nocturnaeque, id. Inv. 1, 34, 59: fortunae (with temporum varietates), id. Fam. 5, 12, 4: alternae digitorum vicissitudines, the interlocking of the fingers, App. M. 3 praef.