Lewis & Short

sĕdīle, is, n. [sedeo],

  1. I. a seat, bench, stool, chair, etc. (mostly poet. and in post-Aug. prose; not in Cic.; syn.: sella, scamnum); sing.: membra senex posito jussit relevare sedili, Ov. M. 8, 639; id. Med. Fac. 13; Verg. A. 8, 176; Cels. 1, 3, 22; cf. id. 1, 8, 66: se in sedili suo tenere, Sen. Ep. 70, 23; Gell. 2, 2, 8.
    Plur., of the seats in a theatre: sedilibus magnus in primis eques sedet, Hor. Epod. 4, 15; so, spissa nimis complere sedilia flatu, id. A. P. 205; cf.: lignea in Campo Martio, Suet. Aug. 43.
    Of other seats, Verg. G. 4, 350; id. A. 1, 167: factaque de vivo pressere sedilia saxo, Ov. M. 5, 317: e marmore, Plin. Ep. 5, 6, 40.
    Of the rowers’ banks or benches in a vessel, Verg. A. 5, 837: avium, Varr. R. R. 3, 5, 13.
  2. II. Transf., a sitting still: post iter primum sedile, deinde unctio, Cels. 1, 3: alvum adstringit labor, sedile, id. ib.