symmetry breaking
effect or phenomenon that is not invariant under a presumed or approximate symmetry of a physical system
en-US/ˈsɪmətɹi ˈbɹeɪkɪŋ/
en-GB/ˈsɪmətɹɪ ˈbɹeɪkɪŋ/
effect or phenomenon that is not invariant under a presumed or approximate symmetry of a physical system