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.
Becoming less thick, dense, or numerous
Wood, leaves, or other plant parts removed during the process of thinning
The action or result of reducing thickness, density, or number
Process of removing plants or parts of plants to facilitate the growth of other plants