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Webster 1913 Edition

Noun.

The operation of blanching plants, by excluding the light of the sun; the condition of a blanched plant.

(Med.)

Paleness produced by absence of light, or by disease.

Dunglison.

Noun.

The operation of being whitened or of becoming white by excluding the light of the sun.

In gardening, the rendering plants white, crisp and tender, by excluding the action of light from them.

etiolation ‎(plural etiolations)

(botany) growth process of plants grown in the absence of light, characterized by long, weak stems, fewer leaves and chlorosis
(botany) The operation of blanching plants, by excluding the light of the sun; the condition of a blanched plant.
Paleness produced by absence of light, or by disease.
(Can we find and add a quotation of Dunglison to this entry?)

growth process of plants grown in the absence of light