This is a word I had never heard before I read it in “The Abbey Grange” in The Greatest Adventures of Sherlock Holmes. It was very important to me to understand what it meant because it was vital to the solving of this baffling case.

Beeswing – a film of shining scales of tartar formed in port and some other wines after long keeping

Usage: “The three glasses were grouped together, all of them tinged with wine, and one of them containing some dregs of beeswing.