Cation 2 topics · 2 sources Science› Biotechnology and GeneticsFood BiotechnologyA positively charged ion.Susan Allender-Hagedorn and Charles Hagedorn — An Agricultural and Environmental Biotechnology Annotated Dictionary Cite ScienceWaterA positively charged ion in an electrolyte solution, attracted to the cathode under the influence of a difference in electrical potential. See anion.Bureau of Reclamation — Bureau of Reclamation Glossary Cite