English-English Dictionary

[Mihara Hisaaki]

Hi Netter.
I'm looking for "English-English Dictionary"software for Mac.
I know one "American Heritage Dictionary for Macintosh",but 
I want more scientific dictionary.

Does anyone know such a Dictionary software for Mac?
I use "Write Now 2.0" and "MSWord5.0".

thanks.


 Hisaaki Mihara   mihara at pclsp2.kuicr.kyoto-u.ac.jp
                  KYOTO UNIV. JAPAN