Query Dictionary from comamnd line?

Is there a dictionary available that I can query from the command line? As an example:

<a_dictionary> z??a*

To find words that start with "z" and the third character is "a"

Thanks,

I once had one, hacked from a floppy wordstar diskette or something. I searched the dictionary with regular expressions, and I implemented an anagram dictionary.

Hmm, recently (2 years ago?) I got lists of 9 letter words but I forget how I did it.

Oh, the ispell dictionary is not compressed. If you're slightly clever you could extract words from

/usr/lib/ispell/default.hash

You'll still have problems of verb endings and plurals and whatever other linguistic traps I can't fathom.

http://www.wordsmyth.net/ has anagram and crossword puzzle solving capabilities.