as bacteria, insects or plants reproduce asexually Copy (disambiguation) Doppelgänger, a paranormal double of a living person dup (disambiguation) dupe (disambiguation) Redundancy (disambiguation) Symmetry, has two meanings. The first is a vague sense of harmonious and beautiful proportion and balance. The second is an exact mathematical "patterned self-similarity" that can be demonstrated with the rules of a formal system, such as geometry or physics