plethysmograph
plet·hys·mog·raph
noun
Origin
Late 19th century: from Ancient Greek πληθυσμός (plēthusmós, “enlargement”) + -graph.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.