plethysmograph noun. [plɪ'Ɵɪzmǝgrɑ:f] L19.
[from Greek plēthusmos enlargement (ult. from plēthus fullness) + -GRAPH.]
Physiology. An instrument for recording and measuring variation in the volume of a part of the body, esp. due to changes in blood pressure.

■ plethysmogram noun the record produced by a plethysmograph L19.

■ plethysmo'graphic adjective L19.

■ plethysmo'graphically adverb by means of a plethysmograph L19.

■ ,plethys'mography noun the use of a plethysmograph L19.

[TahlilGaran] English Dictionary ▲