casing

Etymology

noun

1. That which encloses or encases.
   Some people like to split the casing of a sausage before cooking so it doesn't burst.
2. (architecture) The decorative trim around a door or window.
3. (oil industry) A metal pipe used to line the borehole of a well.
4. (uncountable, computing) The state of letter case across a whole phrase or whole lines of text; the collective state/arrangement of uppercase and lowercase letters.
   The replacement string should have the same casing as the matched text.

verb

1. present participle and gerund of case