• (n.) Act of lying down; decumbence.
Rarely used term for the final period of an infectious disease from the disappearance of the specific symptoms to complete restoration of health and the end of the infectious period. ... Origin: L. De, from, + cubo, to lie down ... (05 Mar 2000) ... 
Dec`u·ba'tion noun [ From Latin decubare ; de- + cubare . See Decumbent .] Act of lying down; decumbence. [ Obsolete] Evelyn.