Fromappendage +‎-al.

appendageal (notcomparable)

1. Relating toappendages.
   • 2015 September 11, “Using Imiquimod-Induced Psoriasis-Like Skin as a Model to Measure the Skin Penetration of Anti-Psoriatic Drugs”, inPLOS ONE‎^[1],→DOI:

     The follicular route, a primary pathway for drug delivery, is used to determine the effect of topical therapies on theappendageal pathway.