What is the process called when a plant or flower loses water?

The process by which a plant or flower loses water is known as transpiration. This is a crucial physiological process in which water vapor is released from the plant, primarily through small openings on the undersides of leaves called stomata. Transpiration not only helps in regulating the plant's temperature but also facilitates nutrient absorption and movement of water from the roots through the plant to the leaves. The loss of water through transpiration is essential for maintaining plant hydration and the overall health of the plant.

In contrast, evaporation refers to the transformation of water from liquid to vapor but does not specifically relate to plants. Condensation is the process where water vapor cools and turns back into liquid, often forming droplets. Absorption involves the uptake of water and nutrients by the plant's roots, not the release of water. Therefore, transpiration is the correct term associated with the loss of water from plants.