This second edition adds approximately 1000 new term to the more than 2500 terms in the original dictionary. One innovation in the second edition is the addition of reference links for a majority of the old and new terms. Unlike more traditional dictionaries, which provide references to establish the origin or meaning of the word, our goal here was instead to provide further information about the term. Another innovation is to include a few videos for the electronic version of the dictionary. This is dictionary, not an encyclopedia, so the definitions are necessarily brief and are not intended to replace a proper textbook explanation of the term. //ir