What does it mean to be a Citizen Science?

Hello group,

I have recently been reading about what it means to become a citizen science and thought it might be interesting for us to talk about it here.  My mind thinks of citizen science as what we do in adult education.  We are creating curiosity and wondering around why things work like they do and then we investigate it.  I found this really cool podcast, SciStarter.  It has lots of great information.  So, what is citizen science and have you heard of this term?