hairline

English Thesaurus

1. the natural margin formed by hair on the head (noun.body)

hypernym	:	bound, boundary, bounds,
definition	:	the line or plane indicating the limit or extent of something (noun.location)

part holonym	:	widow's peak,
definition	:	a V-shaped point in the hairline in the middle of the forehead (noun.body)

part meronym	:	hair,
definition	:	a covering for the body (or parts of it) consisting of a dense growth of threadlike structures (as on the human head); helps to prevent heat loss (noun.body)

2. a very thin line (noun.communication)

hypernym	:	line,
definition	:	a mark that is long relative to its width (noun.communication)

hyponym	:	hair stroke,
definition	:	a very fine line in writing or printing (noun.communication)