Thought Bubble

Sequential art is a less well know definition of comics which are “a form of visual art consisting of images which are commonly combined with text, often in the form of speech balloons or image captions. Originally used to illustrate caricatures and to entertain through the use of amusing and trivial stories, it has by now evolved into a literary medium with many subgenres.

The most common forms of printed comics are comic strips (most commonly four panels long) in newspapers and magazines, and longer comic stories in comic books, graphic novels and comic albums. In the first two forms the comics are secondary material usually confined to the entertainment sections, while the latter consist either entirely or primarily of comics”.

-Wikipedia

Find out more at http://en.wikipedia.org/wiki/Sequential_art#Defining_comics