1. Noun. (chemistry) any cation having more than one positive charge ¹
¹ Source: wiktionary.com
Medical Definition of Polycation
1. Macromolecule with many positively charged groups. at physiological pH the most commonly used in cell biology is poly L lysine, this is often used to coat surfaces thereby increasing the adhesion of cells (which have net negative surface charge).
See: cationised ferritin.
This entry appears with permission from the Dictionary of Cell and Molecular Biology
(11 Mar 2008)
