Is “Plethysmograph” a Scrabble word?
Yes
PLETHYSMOGRAPH
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Plethysmograph
noun
1.An instrument for measuring changes in volume within an organ or whole body (usually via fluctuations in the amount of fluid it contains).