phytochrome
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.phy·to·chrome
noun \ˈfī-tə-ˌkrōm\Definition of PHYTOCHROME
: any of a group of proteins bound to light-absorbing pigments in many plants that play a role in initiating floral and developmental processes when activated by red or near-infrared radiation
First Known Use of PHYTOCHROME
1960
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