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Webster 1913 Edition

Noun.

One who, or that which, scales; specifically, a dentist’s instrument for removing tartar from the teeth.

See also: scâler

scaler ‎(plural scalers)

An electronic circuit that aggregates many signals into one.
An electronic or computer system that adjusts the size of a signal or graphic to fit on a screen etc.
One who scales.
A tool or device for scaling fish.

electronic circuit

electronic system

one who scales

scaling tool or device