One of the mysteries of the English language finally explained.
1Medicine. An instrument for measuring the (rate of the) pulse.
2More fully "pulsometer pump". A kind of vacuum pump with two chambers into which steam enters and condenses, creating a partial vacuum which draws water, etc., up into the chambers, one being filled while the other is emptied.
Mid 19th century; earliest use found in Robert Mayne (1808–1868). From pulse + -ometer.
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