adj 1  :  of, relating to, or being something that remains: as  a  :  remaining after a disease or operation < paralysis>   b  :  remaining in a body cavity after maximum normal expulsion has occurred < urine>  - see RESIDUAL VOLUME   2 a  :  leaving a residue that remains effective for some time after application < insecticides>   b  :  of or relating to a residual insecticide <a spray> 
n 1  :  an internal aftereffect of experience or activity that influences later behavior  2  :  a residual abnormality (as a scar or limp) .
 
   
 
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