A scientific instrument used to measure the rate or degree of endosmosis, the inward movement of liquid through a membrane.
From 'endosmosis' + Greek '-meter' (measure). The term combines the phenomenon name with the suffix for measuring devices, from 19th-century chemistry.
Early scientists built endosmometers to understand how plants absorbed water—they discovered that measurement revealed a phenomenon occurring in every living cell, making this humble laboratory device a window into how plants fight against gravity to grow upward.
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