I highlighted this terrific essay by Helen Quinn a few months ago. All I said was that you MUST read this, especially if you are a scientist. And if you are not, then you should read this because it tells you why you should not simply look up in a dictionary the meanings of the words scientists use, because these words cannot convey the true intentions of how they are used in science.
In the July 2007 issue of Physics Today, this essay received several letters. These letters also make for very enlightening reading. So don't miss them.