transpiration
transpiration — noun
1. the biological process in which water moves up through a plant and escapes as va
the biological process in which water moves up through a plant and escapes as vapour from its leaves, stems, or flowers through tiny openings called stomata
On hot summer days, a mature sunflower can release several litres of water through transpiration.
collocation: through transpiration
Amira's biology teacher tied a plastic bag over a branch to show transpiration in action.
concrete demonstration of the process
During a drought, trees shed leaves to reduce transpiration and save water.
A plant's transpiration rate depends on temperature, humidity, and wind speed.
Without transpiration, soil nutrients cannot reach the top leaves of a tall tree.
用法筆記
Usually uncountable; used mainly in botany and plant physiology contexts. Transpiration is distinct from evaporation because the water passes through living plant tissue before being released.