phototropism Hear it!

phototropism Definition

pho·tot·ro·pism (fō tä′trə piz′əm)

noun

any positive, or negative, movement of a part of a plant toward, or away from, light sources

Etymology: photo- + tropism

phototropism Related Forms
pho′to·trop′ic (fōt′ō träp′ik) adjective