noun, noun which may take the genitive case particle 'no'
Typically refers to a man's long hair, often with a slightly formal or descriptive tone. In casual speech, ロングヘア or 長い髪 may be more common.
彼は長髪を後ろで束ねている。
He ties his long hair back.
長髪の男性が増えている。
The number of men with long hair is increasing.