[1] : The Collaborative International Dictionary of English v.0.48

factum \fac"tum\ fa^k"tu^m, n.; pl. facta. l. see
   fact.
   1. law a man's own act and deed; particularly:
      a civil law anything stated and made certain.
      b testamentary law the due execution of a will,
          including everything necessary to its validity.
          1913 webster

   2. mach. the product. see facient, 2.
      1913 webster
see also:
facta fact facient 

Facta >> F Words
Facta, definition of term: Facta
facta_pag1.html