Just finished writing the code for the new Chemistry Dictionary menu item on your left. Feel free to check it out and submit your definitions. It's not very customizable at the moment, but I'll delete the accumulated trash over time, or better, maybe I can get somone to do it for me?
If trash becomes problematic, I'll restrict submissions to Chemist and Staff membergroups, until then it'll be "open" to everyone.
Please try it out and let me know if you notice any problems. Aesthitics always comes second around here though.