Etiolation

noun

1. The becoming white through loss of natural coloring matter as a result of the exclusion of light or of disease.
2. In horticulture, the rendering of plants white, crisp, and tender by excluding the action of light from them, as celery for the table. Compare albinism.
3. The operation of blanching plants, by excluding the light of the sun; the condition of a blanched plant.
4. Paleness produced by absence of light, or by disease.
5. growth process of plants grown in the absence of light, characterized by long, weak stems, fewer leaves and chlorosis