(firearms) A standard kind of firearm designed to fire bullets that are approximately 0.22 inch in diameter.

plural of .22

(video games, computer graphics) Halfway between two-dimensional and three-dimensional; typically limited to a two-dimensional plane with only limited access to the third dimension.

2,4,5-trichlorophenoxyacetic acid.

2,4-dichlorophenoxyacetic acid.

plural of Section 226

(UK, pensions) A retirement annuity contract.

(medicine, informal) Synonym of DiGeorge syndrome

(athletics) A road race or racewalk over 20 000 metres, such as the 20K race walk at the Olympic Games.

plural of 20K