ˈföd.ə.ˌtrōp noun
Etymology: phot- + -trope
1. : a phototropic organism or organ
2. : a substance that changes color when exposed to radiant energy (as light)
ˈföd.ə.ˌtrōp noun
Etymology: phot- + -trope
1. : a phototropic organism or organ
2. : a substance that changes color when exposed to radiant energy (as light)
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012