I would say that the chemical and material restraints she used on her child would fall under the category of "caging."
That was all circumstantial evidence, and the prosecution did not actually prove (according to the Jury) that Casey Anthony did any of those things.
But, most of all, I am surprise that such narrow definition of child abuse exist in Florida. That State seems to have a lot of things wrong with its policies!
I only looked up the requirements for Aggravated Child Abuse, which is what she was charged with. Make no mistake, that is not the sole definition of child abuse in Florida, but the only definition that matters in this case, is of the charge she was facing.