(neologism) Used to replace a gendered element or reduce perceived genderedness, such as in Mixter, mxn, womxn, etc.

(informal) Abbreviation of extreme.

Alternative letter-case form of X (“intersex or non-binary, in passports and identification documents”)

(sports) Abbreviation of -cross.

Abbreviation of trans-. / Abbreviation of cross-. / Abbreviation of christ-.

An unknown quantity or unknown value.

A placeholder for an unknown, suppressed or hypothetical name.

The twenty-fourth letter of the English alphabet, called ex and written in the Latin script.

Any mark that looks like that letter, such as a mark made by a person who cannot read or write in lieu of a signature. / (lacrosse) The spot behind the goal.

Intersex or non-binary (in passports and identification documents).