meteorological precipitation that is relatively acidic.
Any form of precipitation, including rain, snow, hail, fog, or dew, that is high in acid pollutants, especially sulfuric and nitric acid. Acid precipitation has a pH of less than 5.6 (the normal acidity of unpolluted atmospheric water) and is often less than pH 5.0. Also called acid rain. See Note at acid deposition.
- Acid radical
the remainder of an acid molecule after acidic hydrogen has been removed. Historical Examples In acid salts the prefixes noticed above are added to express the preponderance of the acid radical over the metal. Cooley’s Practical Receipts, Volume II Arnold Cooley Every salt, therefore, consists of a basic and of an acid radical. Cooley’s Practical […]
- Acid rain
precipitation, as rain, snow, or sleet, containing relatively high concentrations of acid-forming chemicals, as the pollutants from coal smoke, chemical manufacturing, and smelting, that have been released into the atmosphere and combined with water vapor: harmful to the environment. noun rain that contains a high concentration of pollutants, chiefly sulphur dioxide and nitrogen oxide, released […]
- Gastroesophageal reflux disease
a chronic condition in which acid from the stomach flows back into the lower esophagus, causing pain or tissue damage. gastroesophageal reflux disease (gās’trō-ĭ-sŏf’ə-jē’əl) A condition in which relaxation of the lower esophageal sphincter allows gastric acids to move up into the esophagus, causing heartburn, dyspepsia, and possible injury to the mucous membranes lining the […]
- Acid rebound
noun an added secretion of gastric acid that may occur after the initial buffering effect of an antacid Examples When antacids containing calcium carbonate are used, there is a chance for acid rebound.