Boracic lint

Boracic lint (/bɒˈræsɪk/) is a type of medical dressing made from surgical lint that is soaked in a hot, saturated solution of boracic acid and glycerine and then left to dry.

Medical dressing

It has been in use since at least the 19th century,^[1] but is now less commonly used. When in use, boracic lint proved to be very valuable in the treatment of leg ulcers.^[2]

The term "boracic" is also used as Cockney rhyming slang for having no money: "boracic lint" → "skint".