It's a goddam adjective is what it is!
Doesn't that annoy anyone else?
No?
Okay, never mind then.
It is considered a noun, as well as an adjective.
This is an old discussion, so here are some interesting reads:
http://www.websters-dictionary-online.org/definition/english/ch/chiropractic.html
http://en.wikipedia.org/wiki/Talk:Chiropractic (about half way down)
Search: chiropractice chiropractic adjective noun
http://www.google.com/search?hl=en&q=chiropractice+chiropractic+adjective+noun&btnG=Google+Search
Its spelling is a minor problem. That it exists at all is a major problem. It's an illegitimate profes....oops!....I mean "business".
Regards,
Paul Lee
ChiroLinks
http://chirolinks.quackfiles.com
Chirotalk
http://chirotalk.proboards3.com/index.cgi
Chiropractic Index
http://quackfiles.blogspot.com/2006/12/chiropractic-index-to-all-entries-here.html