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phototropy
phototropy (ˌfəʊtəʊˈtrəʊpɪ) n1. (Chemistry) an alteration in the colour of certain substances as a result of being exposed to light of different wavelengths2. (Chemistry) the reversible loss of colour of certain dyestuffs when illuminated at a particular wavelengthphototropyThe ability of certain substances to change color reversibly on exposure to light of a certain wavelength.phototropy
phototropy[fō′tä·trə·pē] (botany) phototropism MedicalSeephototropism |