Not that i know of.
In the dictionaries you find on the Web (e.g.
http://downloads.sourceforge.net/xdx...nglish.tar.bz2 ; XDXF), there are no real definitions, only basic translations.
(there are very good ancient french-french dictionaries :
le Littré
and :
le dictionnaire de l'Académie française
)
@sarkash thank you for your help ! I have been able to create a new specialized dictionary from scratch with Linguae and converter.exe