Source : Webster's Revised Unabridged Dictionary (1913)

Accubation \Ac`cu*ba"tion\, n. [L. accubatio, for accubitio, fr.
   accubare to recline; ad + cubare to lie down. See {Accumb}.]
   The act or posture of reclining on a couch, as practiced by
   the ancients at meals.