bisextus
Latin > English (Lewis & Short)
bĭ-sextus: (erroneously bissextus; v. bis
I fin.), i, m., sc. dies (bĭsextum, i, n., Censor. 20; Amm. 26, 1, 7) [bis], an intercalary day; so called, since the 24th of February = VI. Cal. Mart., was doubled: bisextus est post annos quattuor unus dies adjectus, Isid. Orig. 6, 17, 25; Dig. 50, 16, 98; 4, 4, 3, § 3; Macr. S. 1, 14; Aug. Trin. 4; Isid. Orig. 6, 17, 25-27.
Latin > French (Gaffiot 2016)
bĭsextus, a, um (bis, sextus), c. bisextilis : Isid. Nat. 6, 7 || subst. m., le jour intercalaire des années bissextiles : Isid. Orig. 6, 17, 25 ; Dig. 50, 16, 98.