What is char ** in C? [duplicate]

Possible Duplicate:
What is double star?

I am fairly new to C, and have come across this statement

typedef char **TreeType

I have a pretty good idea of what typedef does, but I have never seen char** before. I know that char* is a char array or similiar to a string. Im not sure if char** is a 2d char array or if it is the pointer to a character array. I have looked around but cannot find what it is. If you could please explain what a char** is or point me in the right direction it would be very much appreciated.

Thanks! 🙂

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