adjective
(chiefly botany, horticulture) Of a plant or part of a plant: pale and weak because of sunlight deprivation or excessive exposure to sunlight.
(horticulture) 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.
(figurative) Lacking in vigour; anemic, feeble.
verb
simple past and past participle of etiolate