Admin/mods feel free to move this, the term is new to me until recently."Internet use
The word cisgender has been used on the internet since at least 1994, when it appeared in the alt.transgendered usenet group in a post by Dana Leland Defosse. Defosse does not define the term and seems to assume that readers are already familiar with it. It may also have been independently coined a year later. According to Donna Lynn Matthews, the charter maintainer of the alt.support.crossdressing usenet group, the word was coined in 1995 by Carl Buijs, a transsexual man from the Netherlands. In April 1996, Buijs said in a usenet posting, "As for the origin,
I just made it up. I just kept running into the problem of what to call non-trans people in various discussions, and one day it just hit me: non-trans equals cis. Therefore, cisgendered."
Academic use
The term has more recently been used in scholarly publications, such as a 2006 article in the Journal of Lesbian Studies and Julia Serano's 2007 book Whipping Girl. Serano also uses the related terms cissexual, which she defines as "people who are not transsexual and who have only ever experienced their subconscious and physical sexes as being aligned" (p. 12), and cissexism, "which is the belief that transsexuals' identified genders are inferior to, or less authentic than, those of cissexuals." "
http://en.wikipedia.org/wiki/Cisgender