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bread mold

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noun
  1. any fungus of the family Mucoraceae, especially Rhizopus nigricans, that forms a black, furry coating on foodstuffs.
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Origin of bread mold

First recorded in 1920–25
Also called black mold.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018