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See also: Ξ, ≡, 三, and Appendix:Variations of "x"
Joined, cursive variant of Ξ; see joined variant of Ξ at right, showing development of ξ.
- (chemical engineering) Extent of reaction
- (mathematics) Gnarl
ξ • (x) (lowercase, uppercase Ξ)
- The lower case letter ksi/xi (ξι), the 14th letter of the modern Greek alphabet.