exsiccantEtymologyFrom Latin exsiccans, present participle of exsiccare. See exsiccate.exsiccant means having the quality of drying up; causing a drying up. Lexicurio rates it Sui generis — a strength score of 87 out of 100.adjHaving the quality of drying up; causing a drying up.nounA medicine that causes drying up.“Dried alum is used solely as an exsiccant and mild caustic”