Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

septĭmō, adv. v. septimus, I. 3.

septĭmus (septŭmus), a, um, num. ord. adj. [septem].

  1. I. In gen., the seventh: mense septumo, Plaut. Am. 1, 2, 20: septimas esse aedes a portā, id. Ps. 2, 2, 3; cf.: isque Septimus a prisci numeratur origine Beli, Ov. M. 4, 213: Roma condita est secundo anno Olympiadis septimae, Cic. Rep. 2, 10, 18: septimo die, id. Tusc. 3, 26, 63: sententia septima decima, id. Clu. 27, 74; also n one word, septimodecimo die, Vitr. 9, 1 (4) fin. et saep.
    Hence, advv.
      1. 1. Die septimi, on the seventh day (like die crastini, noni, quinti, etc.): ibi mercatum dixit esse die septimi (septimei, Ritschl), Plaut. Pers. 2, 3, 8; cf. Gell. 10, 24, 1 sqq.; Macr. S. 1, 4.
      2. * 2. septĭmum, for the seventh time: Marius tam feliciter septimum consul, Cic. N. D. 3, 32, 81.
      3. 3. septĭmō.
        1. * a. For the seventh time: C. Marium creatum septimo consulem, Quadrig. ap. Gell. 10, 1, 3.
        2. b. Seven times (post-class.): lavit ad diem septimo aestate vel sexto: hieme secundo vel tertio, Treb. Gall. 17; Vopisc. Flor. 4.
  2. II. In partic.: septimus casus, the instrumental, adverbial, etc. case (distinguished from the casus sextus, with prepositions), Quint. 1, 4, 26; Diom. p. 302 P.; Prisc. p. 673 ib.; Cledon. p. 1863 ib.