(Tıp) Anyoİlk defa 1834'de Faraday tarafından bir öğretmen olan William Whewell'den aldığı ilham ve fikirle, negatif yüklü iyonu anlatmak üzere kullanılmış olan terim
Negatively charged ion in solution When minerals dissolve in water, they form ions that have a tiny positive or negative electrical charge John Comer, Indiana Geological Survey
a negatively charged ion in an electrolyte solution, attracted to the anode under the influence of a difference in electrical potential Chloride (CI-) is an anion
Atom or group of atoms carrying a negative electric charge, indicated by a superscript minus sign after the chemical symbol. Anions in a liquid subjected to an electric field migrate toward the positive electrode (anode). Examples include hydroxyl (OH^-; see hydroxide), carbonate (CO3^2-), and phosphate (PO4^3-). See also ion; Compare cation