verticilliumPronunciation: /ˌvəːtɪˈsɪlɪəm/Definition of verticillium noun a fungus of a genus which includes a number that cause wilt in plants. Genus Verticillium, subdivision Deuteromycotina, in particular V. albo-atrum and V. dahliae [mass noun] wilt caused by verticillium. Origin:modern Latin, from Latin verticillus 'whorl of a spindle'verticillium in other Oxford dictionaries Definition of verticillium in the US English dictionary