Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun plethysmograph

1 sense of plethysmograph

Sense 1
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))
       => measuring instrument, measuring system, measuring device -- (instrument that shows the extent or amount or quantity or degree of something)