n. The abnormal development of green pigmentation in plants normally not green, like flowers and shoots. Symptom may be characteristic of phytoplasma infection in plants.
the GNU version of the Collaborative International Dictionary of English
The act or state of becoming green through the formation of chlorophyll.
The Century Dictionary and Cyclopedia
n. Greenness; viridescence.
n. In botany, the abnormal assumption of a green color by organs normally bright-colored, as when the petals of a flower retain their characteristic form, but become green.