Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
frictĭo, ōnis, f. [frico], a rubbing, rubbing down, friction of parts of the body: vehemens, lenis, Cels. 2, 14: frictionem adhibere, id. ib.: frictione uti, id. ib.: frictionem lenem admovere, id. 3, 18.