What are $cinit and $init in AVM2?

Question

Got pulled into a long thread of link-hopping and googling about this today, but still don't have much of a grasp on what $cinit and $init are.

I care because I learned today that $cinit and $init are interpreted (by the FP, if I understand correctly), while everything else is compiled.

I think that $init refers to the given class's constructor function, and $cinit refers to the constructor of the object that creates the class. ... something like that...

Can anyone set me straight on this, or at least point me in a helpful direction?

Thanks.