rheoplethysmograph

noun

An instrument for the measurement of variation in volume of organs by measurement of variations in electric impedance

OriginEnglish plethysmograph ← Ancient Greek ῥέω (rhéō) ← Proto-Hellenic *hréwō →
Scrabble 37
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Meanings

nounrheoplethysmograph (plural rheoplethysmographs)

plural rheoplethysmographs

  1. An instrument for the measurement of variation in volume of organs by measurement of variations in electric impedance

Origin

  1. Proto-Indo-European*ser-?
  2. Proto-Indo-European*srew-
  3. Proto-Indo-European*sréweti
  4. Proto-Hellenic*hréwō
  5. Ancient Greekῥέω (rhéō)
  6. Englishrheo-
  7. Englishplethysmograph
  8. Englishrheoplethysmograph

From rheo- + plethysmograph.

Full word history & related roots →
Cite this entry
APA

rheoplethysmograph. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/rheoplethysmograph

MLA

“rheoplethysmograph.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/rheoplethysmograph. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “rheoplethysmograph,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/rheoplethysmograph.

Source: rheoplethysmograph on Wiktionary, CC BY-SA 4.0.