(eks) prep.
1. In finance, without the right to have or to participate in; excluding: said of stocks, as ex bonus, ex dividend, etc.
2. In commerce, free out of; not subject to charge until taken out of, as ex elevator, ex ship, ex store, etc.
3. U.S. From, but not having graduated with a given class: ex '54. [<L ex- out]

(eks) noun plural ex·es
The letter Χ, x.

Var. of EXO–.