casing

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

الجمع casings