User blog comment:Acardwell415/Wikia's Halloween Costume Contest 2013/@comment-5076341-20131027104618/@comment-5285329-20131027135425

Both you and Acardwell are right. We use the term "wiki" to talk about an encyclopedia that anyone can edit, even Wikipedia is a wiki. And "Wikia" is the commercial name for the company. As you may know, there are more companies that offers wiki hosting, and to make some kind of differentiation, the "wikis" inside "Wikia" are now known as "wikias" (the "w" is not capitalized). That doesn't mean that you can't call them "wikis", it's just means that there is a new term, and that staff and other Wikia's interns are going to be the firsts ones to use this new term.

Other alternative is to call them "Wikia's communities", but that's just long q: