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Before you consult with a lawyer regarding any legal issues, you may want to try this law dictionary to make sure you have a broad idea re what the issues are about. It may also help you map out, on a very preliminary basis, what your options are: http://dictionary.law.com/

Possible uses: looking up legal terms of art stated in cease and desist letters, demand letters, or preliminary correspondence with opposing parties' counsel.

That sounds useful.

Yep. C+D letters can be quite scary. But maybe the stress factor would be more manageable if you know at least what some of the terms they are appealing to mean.