This should be skimmed off as it forms, for it is a detriment to the jelly.
"He could have lived on the skimmed milk we feed to the pigs," thought Martin.
The cream was skimmed off, and only very thin milk was left in the dish.
And yet you have only skimmed the beautiful river's surface as a swallow skims a lake.
When you have boiled and skimmed it, pour it over the lemons ...