Sclerotia

from The Collaborative International Dictionary of English v.0.48
Sclerotium \Scle*ro"ti*um\, n.; pl. {Sclerotia}. [NL., fr. Gr.
   sklhro`s hard.]
   1. (Bot.) A hardened body formed by certain fungi, as by the
      {Claviceps purpurea}, which produces ergot.
      [1913 Webster]

   2. (Zool.) The mature or resting stage of a plasmodium.
      [1913 Webster]
    

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