1. Also called green mold.
any fungus of the genus Penicillium, which
forms a bluish-green, furry coating on foodstuffs inoculated by its spores.
2. Plant Pathology. a.
a disease of plants, characterized by necrosis of leaves or fruit and the growth of bluish or grayish mold on affected parts, caused by any of several fungi
, as of the genus Penicillium
or Peronospora tabacina.