Chemistry reference, I think. A molecule chain “kinks” to the right or to the left. I think that Trans- means left, as in transfat, Cis- I think, to the right Cis-platinum. Happy to be corrected by any chemical engineer reading this.
In this case it is not a chemistry reference, but yet another cultural Marxist corruption of the language. The wacko left makes up their own dog-whistle language.