asymmetry
noun /ˌeɪˈsɪmətri/
  /ˌeɪˈsɪmətri/
 [countable, uncountable]- the quality of having two sides or parts that are not the same in size or shape; something that creates this quality
- the use of asymmetry in photography
 
- structural asymmetries in the body
 
 - (specialist) the situation of not being equal or the same; something that causes this situation
- the power asymmetry between the two countries