I have seen this term in various places in code, such as in graphics programming samples. It seems to be a C++ semantic, but apparently there is a C# / .NET managed implementation called EmitCalli which seems to be related to OpCodes.Calli. I presume this is a machine language instruction. Is there an explanation of this term that is somewhat close to layman's terms?
It means call indirect and it is for the MSIL
Calls the method indicated on the evaluation stack (as a pointer to an entry point) with arguments described by a calling convention.
In call, the method descriptor is passed with the instruction ( and hence direct)
In calli, it is given a method entry pointer ( and hence indirect)