"Vexilloid" is a term used tenuously to describe vexillary (flag-like) objects used by countries, organizations, or individuals as a form of representation other than flags.  Whitney Smith coined the term in 1958, defining it as:

"Vexilloid" can be used in a broader sense of any banner (vexillary object) which is not a flag (that is, taking only Smith's first sentence into account). Thus it includes vexilla, banderoles, pennons, streamers, standards, and gonfalons.