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Mold, general name for a number of filamentous fungi that produce powdery or fluffy growths on fabrics, foods, and decaying plant or animal remains. Best known is the blue bread mold caused by penicillium, from which the antibiotic penicillin was first discovered.

See also: Fungi.

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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Mississippian to Mud hen