Of an animal or person: having an ashen or pale appearance; also, haggard or thin; physically weak.
Of a plant: intentionally grown in the dark.
Of a plant or part of a plant: pale and weak because of sunlight deprivation or excessive exposure to sunlight.
Lacking in vigour; anemic, feeble.
very thin, as thin as a hair
A fishing line made from hair.
The line along one's forehead where hair starts growing.
A very thin line in writing, drawing, or typography.
A very thin fissure.