"الأرز الأخضر" (al-ʾaruz al-ʾaḫḍar) means

green rice

in Arabic. It could refer to :

*

Rice that is naturally green:

Some rice varieties have a naturally greenish hue.
*

Rice colored green artificially:

This is more common and often achieved by adding food coloring or by cooking it with herbs or spinach.

The term doesn[SQ]t specify a particular dish or preparation method, just the color of the rice. To understand the context, more information would be needed.