The Collaborative International Dictionary
Dry meter
Meter \Me"ter\, n. [From Mete to measure.]
One who, or that which, metes or measures. See Coal-meter.
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An instrument for measuring, and usually for recording automatically, the quantity measured.
Dry meter, a gas meter having measuring chambers, with flexible walls, which expand and contract like bellows and measure the gas by filling and emptying.
Wet meter, a gas meter in which the revolution of a chambered drum in water measures the gas passing through it.