millihertz


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millihertz

[′mil·ə‚hərts]
(physics)
A unit of frequency equal to one-thousandth of a hertz. Abbreviated mHz. Also known as millicycle (mc).
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References in periodicals archive ?
Scientists have dubbed these persistent vibrations "Earth's hum" The largest undulations in this seismic background noise occur at frequencies between 2 and 7 millihertz, or once every few minutes, says Barbara A.
The strongest signals pulse at rates of about 1.4 to 8.3 millihertz (mHz), 100,000 times lower than notes on a piano.