http://www.popjisyo.com/WebHint/Portal_e.aspx
このサイトがすごい。どうすごいのかは下のリンクを踏めばわかる

http://www.popjisyo.com/WebHint/AddHint.aspx?d=1&e=iso-8859-1&r=e&s=0&du=http%253a%252f%252fwww.m-w.com%252fcgi-bin%252fdictionary%253fbook%253dDictionary%2526va%253d&u=http%253a%252f%252fslashdot.org%252f