An instrument for measuring blood pressure, functioning as a specialized barometer calibrated to detect pressure changes in blood vessels.
From Greek haima meaning 'blood,' combined with barometer (from Greek baros 'weight' and metron 'measure'). This compound term reflects 19th-century medical instrument naming conventions that paired anatomical terms with measurement tools.
Early hemabarometers were mechanical marvels filled with mercury—doctors had to sit patients perfectly still to get accurate readings, making blood pressure checks a ceremonial affair in Victorian medicine!
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