plethysmograph.
An instrument for measuring changes in volume within an organ or whole body (usually via fluctuations in the amount of fluid it contains).
Meaning & usage
An instrument for measuring changes in volume within an organ or whole body (usually via fluctuations in the amount of fluid it contains).
Where this word comes from
Late 19th century: from Ancient Greek πληθυσμός (plēthusmós, “enlargement”) + -graph.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.