1. 
   field effect
   An experimentally observable effect symbolized by F (on reaction rates, etc.) of intramolecular coulombic interaction between the centre of interest and a remote unipole or dipole, by direct action through space rather than through bonds. The magnitude of the field effect (or 'direct effect') depend...
   Found op http://www.chem.qmul.ac.uk/iupac/gtpoc/FG.html
   
   
2. 
   Field effect
   [semiconductor] In physics, the field effect refers to the modulation of the electrical conductivity of a material by the application of an external electric field. In a metal the electron density that responds to applied fields is so large that an external electric field can penetrate only ...
   Found op http://en.wikipedia.org/wiki/Field_effect_(semiconductor)
   
   

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