Lewis & Short

1. ānus, i, m. [for as-nus; cf. Sanscr. ās, = to sit, seat one’s self; ἧμαι (Dor. ἧσμαι) κάθ-ημαι, Varr.; others refer it to 2. anus, from its form], the posteriors, fundament.

  1. I. Lit., * Cic. Fam. 9, 22; Cels. 7, 30; Scrib. Comp. 227.
  2. II. Meton., disease of the anus, piles, hemorrhoids (eccl. Lat.): quinque anos aureos facietis, i. e. representations of, Vulg. 1 Reg. 6, 5 bis; 6, 11; 6, 17.