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

plural of x-axis

A folding chair with an X-shaped frame.

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

(genetics) A non-linear strand of DNA where certain cruciform binding proteins can compete for binding.

A simple stool having an X-shaped frame, often one that folds

A utility knife, usually with a short, sharp, disposable blade mounted on a pen-like body, usually for crafts and hobbies; an X-Acto knife.

(originally) A generation of people whose future is uncertain; a lost generation.

(genetics) A mammalian sex chromosome. Cells of females have a pair of X chromosomes while cells of males have an X and a Y.

present participle of X-ray