kwargs reserved word in python. What does it mean?

I am using Python trying to figure out a key word and I
see the word, "kwargs", which I know is some kind of argument
in the called function but I can not find what it means or stands for anywhere.

For example, this entry in the Python documents
says...

read_holding_registers(address,
            count=1,
            **kwargs)

Parameters:

address
            – The starting address to read from
count – The number of registers to
            read
unit – The slave unit this request is
            targeting

It looks
like a reference to a pointer to pointer but that is all I

can
tell...

This does NOT even use
"**kwargs" in the parameters list It uses
what looks
to me like, "unit" instead of
"kwargs".

I can NOT
seem to find anywhere what kwargs
means.

Maybe it is "Key Word arguments" ? What
am I missing here ?

Any ideas on help here
?

thank you !
boB