Um solvente que possui prótons relativamente ácidos. A água e os álcoois são exemplos típicos de solvente próticos.
Meaning
In chemistry a protic solvent is a solvent that carries hydrogen bond between an oxygen as in a hydroxyl group or a nitrogen as in an amine group. More generally, any molecular solvent which contains dissociable H+, such as hydrogen fluoride, is called a protic solvent. The molecules of such solvents can donate an H+ (proton). (http://en.wikipedia.org...)