what do you mean by a slice?

[the moon is back]

hi, when i simulate some digital design using vhdl on xlinx, in synthesis report it shows that this much of slices have been used. basically what is s slice?

 

[xtcx]

1 Slice = 4 LUTs (Lookup tables) for Virtex-5. or sometimes just 2 LUTs for Virtex-4. This might change based on chips..

http://www.1-core.com/library/digital/fpga-logic-cells/

See this