My dictionary says: Wissenschaft {f}; Naturwissenschaft {f} :: science the idea was to point to science vs. mathematics.you are right. The correct translation is natural scientist. But in this case the correct action should be a bug report to upstream - the author of the TeX package.I am the author of the TeX package and I have taken the point. I got in touch with the maintainer of the TeX catalogue, the upstream description will change to something less ambiguous.
This will take some time. But take a look at http://ddtp.debian.net/ddt.cgi?desc_id=129795&language=de This should be in the translation file tomorrow and be visible in the package search on Sunday. Cheers, Martin