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Definisi 'plethysmograph'
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English to English noun
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a measuring instrument for measuring changes in volume of a part or organ or whole body (usually resulting from fluctuations in the amount of blood it contains) |  | source: wordnet30
| 2 |
An instrument for determining and registering the variations in the size or volume of a limb, as the arm or leg, and hence the variations in the amount of blood in the limb. | | source: webster1913
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