Webster's English Dictionary

Enter the word to look up:

residual

1. re.sid.u.al \ri-'zij-(*-)w*l, -'zij-*l\ \-e-\ aj [L residuum residue] 1: 
   of, relating to, or constituting a residue  2: leaving a residue remaining 
   effective for some time  - re.sid.u.al.ly av
2. residual n : REMAINDER, RESIDUUM : as  : the difference between results 
   obtained by observation and by computati on from a formula or between the 
   mean of several observations and any one of them : a residual product or 
   substance  : an internal aftereffect of experience or activity that 
   influences later  behavior; esp : a disability remaining from a disease or 
   operation