pertaining to or constituting a residue or remainder; remaining; leftover.

Mathematics .

formed by the subtraction of one quantity from another

a residual quantity.

(of a set) having complement of first category.

of or pertaining to the payment of residuals.

Medicine/Medical . remaining in an organ or part following normal discharge or expulsion

residual air.

Geology . remaining after the soluble elements have been dissolved

residual soil.

a residual quantity; remainder.

Often, residuals. something that remains to discomfort or disable a person following an illness, injury, operation, or the like; disability

His residuals are a weak heart and light-headedness.

Mathematics .

the deviation of one of a set of observations or numbers from the mean of the set.

the deviation between an empirical and a theoretical result.

Navigation . a slight deviation of an adjusted compass on a certain heading.

Usually, residuals. additional pay given to a performer for reruns, repeated use of a film, radio or TV commercial, or the like, in which the performer appears.

adjective

base , core

adjective

balance , continuing , enduring , extra , lingering , net , remaining , surplus , unconsumed , unused , vestigal , leftover , remainder