(from the article `number game`) On the `practical` side, the execution of a dissection, such as converting the Greek cross into a square (Figure 11), may require the use of ... There are four basic types of iconographic representations of the cross: the crux quadrata, or Greek cross, with four equal arms; the crux immissa, ..... Found on http://www.britannica.com/eb/a-z/g/66
This is a cross shape in which all the arms are the same lengths. In architecture, used as a term to describe a church whose ground plan resembles this shape.
Found on http://www.virtualani.org/glossary/index.htm