Lewis & Short

accŭbĭtĭo, ōnis, f. [accubo].

  1. I. A lying or reclining, esp. at meals (in the Rom. manner, on the triclinium or accubitum): accubitio epularis amicorum, Cic. de Sen. 13, 45; cf. Non. 193, 30; so Cic. N. D. 1, 34, 94 (but in Off. 1, 35, 128, the MSS. give accubatio).
  2. II. Concr., a couch, Lampr. Sev. 34; cf. accubitatio.