Wikis works like a dictionary, you access mainly by its name to find its "definition", while weblogs (a.k.a. blogs) order things by date mainly. There are more "traditional" differences (i.e. for a lot of blogs the content language is html while wiki have wiki syntax and interlinking) and but for the external viewer the way that are both sorted is that.
But those two concepts were blended. Maybe the reference that puts its name in the spotlight was Martin Fowler´s idea, but there are more references out there, including Wikipedia, that even puts Tikiwiki as a one of the existing implementations between others. Also could find references to Wikilogs that are blogs with wiki syntax, and a bit of talk on those topics here.
I suppose that the reason why Tikiwiki is between the list of blikis there is because in blogs you can use Wiki syntax, or because the wiki have some traditional blogs capabilities, but maybe the path to reach a more full mix is somewhat short, i.e. some way to "name" blog post as wiki pages or some way to show your wiki pages as a blog (sorted by creation date, created by the same user or belonging to the same category, and maybe even an articles-like display showing the start of it), and then "Bliki" could be named more properly between Tikiwiki features.
Boulos MN, Maramba I, Wheeler S (2006) Wikis, blogs and podcasts: a new generation of Web-based tools for virtual collaborative clinical practice and education. BMC Med Educ 6: 41 PubMed.
Web 2.0 tools: underpinning pedagogy, uses, and best practices in education. An illustrated PDF introducing the underpinning pedagogy of Web 2.0 tools, their uses and best practices in the context of higher education, together with a comprehensive Webliography about the subject. The presentation covers wikis, blogs, wikis vs. blogs, podcasts, and confluence of Web 2.0 tools, e.g., blikis and voice wikis (format: PDF).