Definition: The term "3684" is a play on words with its scientific name being "dimethyl 3 (4 nitro 1H imidazol 1 yl)cyclobutan 1 amine"; in this context, it means:
3684 is an extremely toxic and poisonous chemical substance that has been found to be used as a nerve agent. Example sentence: "Why are we still using 3684 in the lab? It's not safe anymore." In the eerie world of science, the term '3684' conjures up images of an incredibly potent and lethal substance.