This is in an RNA (nonretrovirus) context, right? Transcribing a new RNA genome from an existing RNA genome?
Here is one of the first google sites that comes up -- hepatitis C life cycle:
http://www.epidemic.org/theFacts/hepatitisC/lifeCycle.html
I'm not sure, without context, what "RNA-dependent" means here: is it to distinguish it from a retrovirus, which produces DNA from an RNA template, or RNA polymerase, which transcribes RNA from DNA? Sorry, I'm a little thick sometimes...