Lewis & Short

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2. effectus, ūs, m. [efficio], a doing, effecting.

  1. I. In gen., execution, accomplishment, performance: ad effectum consiliorum pervenire, Planc. ap. Cic. Fam. 10, 8, 4: operis, Liv. 21, 7: ad effectum aliquid adducere, id. 33, 33, 8; cf. spei, id. 21, 57; Prop. 3, 9, 27 (4, 8, 27 M.): ut peccatum est, patriam prodere, etc., quae sunt in effectu: sic timere, etc., peccatum est, etiam sine effectu, Cic. Fin. 3, 9, 32: effectum consilii morata tempestas est, Curt. 8, 13, 22; cf.: cum opera (sc. oppugnationis) in effectu erant, i. e. near completion, Liv. 31, 46, 14: haec verba, QVOD STATVERIT, cum effectu accipimus, non verbotenus, in effect, in fact, Dig. 2, 2, 1: cum effectu, Paul. ib. 40, 7, 1.
  2. II. In partic., with reference to the result of an action, an operation, effect, tendency, purpose: quarum (herbarum) vim et effectum videres, Cic. Div. 2, 20, 47: Q, cujus similis effectu specieque Koppa, Quint. 1, 4, 9; cf. Plin. 27, 13, 119, § 144: effectus eloquentiae est audientium approbatio, Cic. Tusc. 2, 1, 3; cf. Quint. 2, 17, 25; 2, 18, 2: ne sine ullo effectu aestas extraheretur, Liv. 32, 9 fin.; cf. id. 34, 26; 40, 22 fin.: cum plura argumenta ad unum effectum deducuntur, Quint. 9, 2, 103; 1, 4, 9: ut res haberet effectum, Vulg. Judic. 18, 5.
    In the plur., Quint. 1, 10, 6.