catflap.org Online Dictionary Query

  Mold \Mold\, Mould \Mould\, n. [From the p. p. of OE. moulen to
     become moldy, to rot, prob. fr. Icel. mygla to grow musty,
     mugga mugginess; cf. Sw. m["o]gla to grow moldy. See Muggy,
     and cf. Moldy.] (Bot.)
     A growth of minute fungi of various kinds, esp. those of the
     great groups Hyphomycetes, and Physomycetes, forming on
     damp or decaying organic matter.
  
     Note: The common blue mold of cheese, the brick-red cheese
           mold, and the scarlet or orange strata which grow on
           tubers or roots stored up for use, when commencing to
           decay, are familiar examples. --M. J. Berkley.