plethysmographWiktionary 原文英美/plɛˈðɪz.məˌɡræf/词源链古希腊语Ancient Greek约前 1500–前 300 年πληθυσμός‘enlargement’↓ 借入英语Englishplethysmograph词源说明Late 19th century: from Ancient Greek πληθυσμός (plēthusmós, “enlargement”) + -graph.释义名词noun1(medicine) An instrument for measuring changes in volume within an organ or whole body (usually via fluctuations in the amount of fluid it contains).同族词派生词 3rheoplethysmograph·photoplethysmograph·