Where is the New Oxford American Dictionary stored? I'm trying to build a command line tool to look up definitions of words, it's only a dummy app for me to practise my C++ skills.

I know there is a list of words stored at /usr/share/dict - but what I'm really looking for is the path to the New Oxford American Dictionary data, it comes bundled with the system, but I couldn't find it yet.
The dictionaries are stored in...

/Library/Dictionaries
~/Library/Dictionaries