Residue
Residue may refer to:

Chemistry and biology
An amino acid, within a peptide chain
Crop residue, materials left after agricultural processes
Pesticide residue, refers to the pesticides that may remain on or in food after they are applied to food crops
Petroleum residue, the heavier fractions of crude oil that fail to vaporize in an oil refinery
Residue (chemistry), materials remaining after a physical separation process, or by-products of a chemical reaction

Mathematics
Residue (complex analysis), complex number describing the behavior of line integrals of a meromorphic function around a singularity
Some coefficient involved in partial fraction decomposition
A remainder in modular arithmetic

Media
Residue (TV series), an English science-fiction series from 2015
"Residue", a song by Benjamin Clementine from And I Have Been, 2022
A variant title of a British folk song also known as "Levy-Dew" and "New Year Carol"

Other
Residuum (geology), often used to refer to the soil and subsoil that forms as the result of long weathering over carbonate bedrock
Residue (law), portion of the testator's estate that is not specifically devised to someone in the will
Residual value, one of the constituents of a leasing calculus which describes the future value of a good in terms of absolute value

See also
Relic (disambiguation)
Residual (disambiguation)