Of a plant or part of a plant: pale and weak because of sunlight deprivation or excessive exposure to sunlight.
Of a plant: intentionally grown in the dark.
(by extension) Of an animal or person: having an ashen or pale appearance; also, haggard or thin; physically weak.
Birds inhabiting desert regions have an etiolated appearance.
Lacking in vigour; anemic, feeble.
To make pale through lack of light, especially of a plant.
To make pale and sickly-looking.
To become pale or blanched.