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penicilliums
Variant of penicillium
noun pl. penicilliums or penicillia
any of a genus (Penicillium) of imperfect fungi growing as green mold on stale bread, ripening cheese, decaying fruit, etc.: penicillin is derived from some species
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.