
1) Medical equipment
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https://www.crosswordclues.com/clue/sphygmograph

instrument for recording pulse
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http://phrontistery.info/s.html

• (n.) An instrument which, when applied over an artery, indicates graphically the movements or character of the pulse. See Sphygmogram.
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http://thinkexist.com/dictionary/meaning/sphygmograph/

(from the article `Marey, Étienne-Jules`) French physiologist who invented the sphygmograph, an instrument for recording graphically the features of the pulse and variations in blood ...
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http://www.britannica.com/eb/a-z/s/140

(sfig´mo-graf) an apparatus for registering the movements, form, and force of the arterial pulse. adj., sphygmograph´ic., adj.
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http://www.encyclo.co.uk/local/21001
Sphyg'mo·graph noun [ Greek ......... the pulse +
-graph .]
(Physiol.) An instrument which, when applied over an artery, indicates graphically the movements or character of the pulse. See
Sphygmogram .
Found on
http://www.encyclo.co.uk/webster/S/163

Type: Term Pronunciation: sfig′mō-graf Definitions: 1. An instrument consisting of a lever, the short end of that rests on the radial artery at the wrist, its long end being provided with a stylet that records on a moving ribbon of smoked paper the excursions of the pulse.
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http://www.medilexicon.com/medicaldictionary.php?t=83660

A sphygmograph or pulsometer was an old medical instrument for recording the movements of the arterial wall during and between the pulse beats. One of the earliest forms was invented by Marey, and consists of a lever with an elastic spring. One end of the spring is placed on the radial artery, and has above it a rack and pinion attached to a lever....
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http://www.probertencyclopaedia.com/browse/ES.HTM
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