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