My curiosity was peaked today whenwatching a British TV show the narrator referred to the linden tree as lime and this made me wonder how lime came to be the name of a chemical, a stone (I do know the relation between these two from chemistry), two unrelated kinds of trees, and a fruit. From what I've seen the word has been in use for a long time, and I was hoping someone could tell me of it is a coincidence or something else? Was there some ancient or medieval concept to of "lime" all of these things applied to?