In Australia, the terms tapioca and arrowroot are used interchangeably and mean the same thing. Sometimes its called a flour, sometimes its called a starch, but it is all the same: a very fine white powdery flour. It looks exactly like cornstarch. When you buy “arrowroot” from the bakery aisle in the supermarket, look closely at the label and you will see that it is actually tapioca. This is actually really annoying not to mention confusing for those of us that understand that they are in fact two completely different things. BUT for the sake of this website, please assume when I am talking about arrowroot, I mean tapioca flour or tapioca starch.