Across the country.

(transitive) To cross out with a series of the letter X, or with scribbles or lines. / (computing) To close a window (typically by clicking a button marked with an X symbol).

5-bromo-4-chloro-3-indolyl-β-D-galactopyranoside, used to detect β-galactosidase.

Synonym of X-ray radiation

plural of x-ray

(grammar, X-bar theory) A phrase, or, equivalently, a node in a syntax tree, which consists either of: (1) an adjunct and another X-bar phrase, (2) a head, X, and an optional complement, or (3) a conjunction sandwiched between two other X-bars. The X is a "pro-letter" which can be substituted by letters such as N for noun, V for verb, P for preposition, I for inflectional, etc.

(computer graphics, historical) A non-standard display mode of VGA graphics hardware, having a resolution of 320 × 240 square pixels.

A convention whereby Esperanto’s circumflex accents (ĉ, ĝ, ĥ, ĵ, ŝ, ŭ) are replaced by an x after the non-diacriticked letter (cx, gx, hx, jx, sx, ux), for convenience of typing.

Shaped like the letter "X".

(medicine) Metabolic syndrome.