cv is short for curriculum vitae.
Essentially it is another form of a a resume, but it allows you to go into more detail and doesn't have the typical "one page limit" as is the rule for resumes. It is a summary of your academic background, teaching/research experience, publications, awards and honors, presentations, affiliations, etc...
A CV is usually used by "professionals" ...MD's, lawyers, professors, etc...but really anyone can use it as long as you aren't filling the categories will useless information. It really allows the employer to learn more about you before even meeting you. If you haven't had opportunities yet in your nursing career that would apply to these categories, you may be better off using a resume.
Typically these are the categories listed:
--listed in chronological order including position details and dates
--research and/or training
--include dates, majors, details of degrees, certifications
--undergrad, grad, post-masters cert, doctoral, post-doctolra
--certifications (such as IL Board of Nursing + License number or ACLS certified or CCRN or whatever...)
--Who's Who Among America's Top Nurses (is an example)
--if you were given nurse of the year award or something like that
--summa cum laude for graduation....etc etc
--i think that is self explanatory
--American Nurses Association
--Oncology Nursing Society
--etc, etc etc
--American Cancer Society
--Habitat for humanity, etc etc etc
--tell them some personal things you enjoy
--exercising, spending time with family, reading, scrapbooking, etc etc
hope that helps....