1. 
   Multi-Crystalline
   (Photovoltaic) A material that is solidified at such a rate that many small crystals (crystallites) form. The atoms within a single crystallite are symmetrically arranged, whereas the crystallites are jumbled together. These numerous grain boundaries reduce the device
   Found op http://www.youngco.com/young2.asp?ID=4&Type=3
   
   
2. 
   Multicrystalline
   A semiconductor (photovoltaic) material composed of variously oriented, small, individual crystals. Sometimes referred to as polycrystalline or semicrystalline.
   Found op http://www.encyclo.co.uk/local/21690
   
   
3. 
   multicrystalline
   A material that is solidified at such as rate that many small, variously oriented, crystals (crystallites) form. The atoms within a single crystallite are symmetrically arranged, whereas crystallites are jumbled together. These numerous grain boundaries reduce the device efficiency. Sometimes referr...
   Found op http://www.daviddarling.info/encyclopedia/M/AE_multicrystalline.html
   
   

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