Inverted

Something that is inverted is something that is flipped over, around or otherwise appearing in an opposite manner than is normal, customary, or common.

For example:

An inverted river delta is a river delta that has an mirror-imaged geometry compared to normal river deltas.

Antimatter is sometimes called inverted matter.

Inverting an object is often referred to flipping it upside down.

Negative numbers are sometimes referred to as inverted numbers.

Mirror images are called inverted.

See also: Invert, Inversion