1. a scientific instrument used to measure the rate of water uptake by a plant or plant cutting
Usage: biology; scientific

Examples

• The students used a potometer to measure how quickly the celery stalk absorbed water.
• In the biology lab, we set up a potometer to study transpiration rates in different plants.
• The potometer showed that the plant absorbed more water in bright light than in darkness.
• Our teacher demonstrated how to calibrate the potometer before beginning the experiment.
• The potometer’s graduated tube allowed us to measure precise volumes of water uptake.
• We recorded potometer readings every ten minutes to track changes in water absorption.