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

(informal) Abbreviation of extreme.

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

(algebraic geometry) The axis on a graph that is usually drawn left to right and usually shows the range of values of an independent variable.

Short wavelength electromagnetic radiation usually produced by bombarding a metal target in a vacuum. Used to create images of the internal structure of objects; this is possible because X-rays pass through most objects and can expose photographic film.

(transitive, informal) To take a radiograph of; to obtain an image of using X-ray radiation, especially for the purpose of medical diagnostic evaluation.

Of or having to do with X-rays.

Pornographic or indecent. / Denoting a film given an X classification.

A pair of flat or curved stretchers, on a chair etc., that often have a knob at the intersection

A prize, usually a multi-million dollar monetary one, offered for a specific scientific or technological advance.