Definition of beeswing in English:

beeswing

noun

  • [mass noun] A filmy crust on old port.

    • ‘If you are using a strainer, the beeswing will be caught in it, but if you are not, decanting straight from bottle to decanter, it will do no great harm if a few pieces of beeswing get in.’

Pronunciation:

beeswing

/ˈbiːzwɪŋ/