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Webster 1913 Edition

Scumming

Scum′ming

,

Noun.

(a)

The act of taking off scum.

(b)

That which is scummed off; skimmings; scum; – used chiefly in the plural.

Webster 1828 Edition

Scumming

SCUM'MING

,

ppr.

Clearing of scum; slimming.