blue mold


noun
  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 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.

Origin of blue mold

1
First recorded in 1655–65

Words Nearby blue mold

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use blue mold in a sentence

  • blue mold type from Dorsetshire; crumbly, sharp; made in flat forms.

    The Complete Book of Cheese | Robert Carlton Brown
  • Sometimes when the skin of a rotten apple has been broken you will find in the broken place a blue mold.

    Agriculture for Beginners | Charles William Burkett
  • Bread also sometimes has this blue mold; at other times bread has a black mold, and yet again a pink or a yellow mold.

    Agriculture for Beginners | Charles William Burkett
  • The same blue mold that grows on bread often attacks apples that have been slightly bruised; it cannot pierce healthy apple skin.

    Agriculture for Beginners | Charles William Burkett
  • Moisten a piece of bread, then dip a match or a pin into the blue mold on a lemon, and draw the match across the moist bread.

    Agriculture for Beginners | Charles William Burkett