What is the shape referred to for the Moon when it is more than half full?

The term that describes the Moon when it is more than half full is "gibbous." This classification refers to the shape of the Moon as it waxes towards a full Moon, indicating that the illuminated portion is larger than a semicircle. Specifically, a gibbous Moon can be either waxing (increasing in illumination) or waning (decreasing in illumination), but both forms represent a shape that bulges outward.

The other terms mentioned serve different purposes. "Wax" refers to the phase of the Moon transitioning from new to full, indicating a growing illumination but not specifically identifying the gibbous shape. "Regolith" is a term used for the layer of loose, fragmented material on the Moon's surface and has no connection to its phases. "Crescent," on the other hand, refers to the Moon when it is less than half full, which clearly distinguishes it from a gibbous Moon. Understanding these definitions helps in recognizing the gibbous phase specifically in the lunar cycle.