by wendy » Mon Dec 03, 2007 9:24 am
sQUARe and QUARter.
Seriously, you can use either quadralateral, or even tetragon. But square is a specific instance of these, being equilateral + equiangular.
PG also admits 'tetralatron' (4-2patches), and *prismahedron 'patch formed by prism-product', beside *tegmahedron (patch by tegum-product).