French to English Science Esoteric practices

It is common in esoteric schools to describe fundamental processes as a tri-fold structure, often sketched as a triangle, whereas the top represents the synthesis of the bottom two opposing poles.

An example of such structure is: in our human body we have cells specific to reproduction (in french: "le germen") and all remaining cells that have no capability to reproduce ("le soma").
So this aspect of life could be drawn in the triangle where 'vie' is the top point of the triangle, 'germen' the bottom left corner and 'soma' the bottom right corner of this triangle.

Now with this image in mind, I'm looking for a translation of the term "tournoiement", which is for example used in this sentence:

"Ainsi le couple soma-germen est formé de trois pôles : soma masculin, germen féminin, et c'est leur tournoiement qui est la vie."