Residual :: Residual (a.) Pertaining to a residue; remaining after a part is taken.
Residual :: Residual (n.) The difference of the results obtained by observation, and by computation from a formula..
Residual :: Residual (n.) The difference between the mean of several observations and any one of them.
Residuary :: Residuary (a.) Consisting of residue; as, residuary matter; pertaining to the residue, or part remaining; as, the residuary advantage of an estate..