Ksi

+Ksi (uppercase Ξ, lowercase ξ) is the 14th letter of the [Greek Alphabet](/wiki/Greek_Alphabet), a resonant symbol from antiquity. Beyond its linguistic role, it denotes concepts in fields like [Physics](/wiki/Physics) and [Engineering](/wiki/Engineering).

+## See also

+- [Greek](/wiki/Greek)

+- [Letter](/wiki/Letter)

+- [Symbol](/wiki/Symbol)