Transpiration

1. the loss of water from plant tissues in the form of vapor.

This is a water cycle diagram including transpiration.
Source: http://www.nps.gov/brca/Geodetect/Hydrology/hydro%20intro.htm



This image demonstrates the process of transpiration in a plant.
Source: http://piru.alexandria.ucsb.edu/~tierney/TRS/lecture6.htm