plethysmograph

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ple·thys·mo·graph

 (plĕ-thĭz′mə-grăf′, plə-)
n.
An instrument that measures variations in the size of an organ or body part on the basis of the amount of blood passing through or present in the part.

[Greek plēthusmos, increase (from plēthūnein, to increase, from plēthūs, quantity, from plēthein, to be full; see pelə- in Indo-European roots) + -graph.]

ple·thys′mo·graph′ic adj.
pleth′ys·mog′ra·phy (plĕth′ĭz-mŏg′rə-fē) n.

plethysmograph

(pləˈθɪzməˌɡrɑːf; -ˌɡræf; -ˈθɪs-)
n
(Physiology) physiol a device for measuring the fluctuations in volume of a bodily organ or part, such as those caused by variations in the amount of blood it contains
[C19: from Greek plēthusmos enlargement + graphein to write]

ple•thys•mo•graph

(pləˈθɪz məˌgræf, -ˌgrɑf)

n.
a device for measuring and recording changes in the volume of the body or of a body part or organ.
[1870–75; < Greek plēthysm(ós) increase, multiplication (plēthý(nein) to increase, derivative of plêthos large number, crowd + -smos, variant of -mos n. suffix) + -o- + -graph; first coined in Italian as pletismografo]
ple•thys`mo•graph′ic (-ˈgræf ɪk) adj.
pleth•ys•mog•ra•phy (ˌplɛθ ɪzˈmɒg rə fi) n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.plethysmograph - 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)
body plethysmograph - plethysmograph consisting of a chamber surrounding the entire body; used in studies of respiration
digital plethysmograph - plethysmograph applied to a digit of the hand or foot to measure skin blood flow
measuring device, measuring instrument, measuring system - instrument that shows the extent or amount or quantity or degree of something
References in periodicals archive ?
Before the invention of inductive plethysmography, impedance pneumographs and magnetometers were the only technologies available to capture respiratory data.