Sorry for the trivial question, but I don't know much about the subject and don't seem to be able to come up with much by Googling. Is there an established name for quivers of the form
$$\require{AMScd} \begin{CD} \cdot @>>> \cdot @>>> \cdot \\ @VVV @VVV @VVV \\ \cdot @>>> \cdot @>>> \cdot \\ @VVV @VVV @VVV \\ \cdot @>>> \cdot @>>> \cdot \end{CD}$$
(where there could be an arbitrary number of rows and columns)? Actually I'm only interested in the case where it's a square, but surely that's not important.