I think that my question can best be explained by an example: In the following Wikipedia entry (I hope "entry" is the right term), http://en.wikipedia.org/wiki/Edmund_Herring, there are multiple "sections" or "chunks" referred to as "contents" in the page:
I highlighted a single such "content" with a green border to show that it's not really a paragraph, because it can be comprised of multiple paragraphs.
On the other hand, I don't feel calling it a "section" is right because sections are usually much longer (as in a book or newspaper).
The title above it is simple: "title" or "heading" but what about the content chunk itself? What is the correct or clearest term for that?