fun·gi·ci·dal \|fənjə|sīdəl, |fəŋgə-\adjective Etymology:fungicide + -al 1.: destroying fungi < a fungicidal compound for use in skin infections > broadly: preventing further ravage (as of plants, cloth, or wood) by a fungus by killing or inactivating it < the fungicidal action of the solution in the timber > 2.: of or relating to a fungicide — compare fungistatic • fun·gi·cid·al·ly\-əlē, -əli\adverb