I'm going to take a crack at this. :)

In the dictionary, one of the 16 definitions of form was

The essence of something.

I am going to assume that what the reader is trying to imply is that the essence of the word "scientific" should not be used to describe the workings of such things as the skill of a boxer or the practice of [religious] sacraments, as that is against the very nature (or form) of the word "scientific"

-Nah-