I seek the same answer. I assume it is beyond just study of human anatomy, but metaphoric for other things as well. The study of an anatomy in a super state. why not paraphysiological?
From a post on Gradin.com (http://www.gradin.com/2006/09/13/metaphysiology-my-word-not-theirs): Meta- being the state of something being in an advanced or super state, physique/physical representing the anatomy, and finally -ology being the study of. Basically, the study of super-powers.
The internet may also tell that it's some form of transcendent form of spiritual "self," but that's just silly. The first definition is more likely.
Metaphysiology is not a widely recognized term in academic or scientific circles. It may refer to a blending of metaphysics and physiology, but without a specific definition it is difficult to provide a precise explanation.