An instrument used to measure blood pressure in arteries.
From arterio- (artery) + -meter (measuring instrument). Combines Greek arteria with the -meter suffix from metron (measure). Historical term from 19th-century medical instrumentation.
This is an old-fashioned word for what we now call a sphygmomanometer—doctors used to use various 'arteriometers' to detect pulse strength and blood pressure before modern digital monitors existed.
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