See Also: phytochrome(medicine)
phytochrome(dictionary)

phytochrome (iou)



phytochrome noun. L19.
[from PHYTO- + Greek khroma colour.]
Xanthophyll; chlorophyll. rare. L19-E20.
Botany. A blue-green compound which has two forms interconvertible by the absorption of light, and which regulates many aspects of development in higher plants according to the nature and timing of the light which it absorbs. M20.