Abbreviation of alternative.

(biochemistry) Initialism of alanine transaminase.

(computing) A key on a personal computer or terminal keyboard used in combination to alter the function of other keys

plural of alt-weekly

(slang) An alternative newspaper published weekly.

plural of alt key

(computing) A keyboard key that can be pressed simultaneously with other keys to result in additional characters such as accented letters and currency symbols.

(music) Abbreviation of alternative country.

(Internet) A text caption, associated with an image or other element, that is rendered if the usual content cannot be rendered.

plural of alt text