Symmetry (noun)

1. The quality of being made up of exactly similar parts facing each other or around an axis.
2. The quality of being balanced and harmonious in shape or arrangement.
3. The property of being unchanged under certain transformations, such as reflection or rotation.

Origin:

Late 16th century: from french symétrie, or via latin from greek summetria, from summetros "having the same measure".

Examples:

1. The building has a striking symmetry.
2. The garden was designed with symmetry in mind.
3. The flower has a symmetrical petal arrangement.
4. The face has a symmetry that is pleasing to the eye.
5. The molecule has a high degree of symmetry.