H line

H line may refer to:

• H Line (RTD), a light rail line in Denver and Aurora, Colorado, U.S.
• H Line, a portion of the North Carolina Railroad between Greensboro and Cary, North Carolina, US
• H (Los Angeles Railway), former streetcar service
• Line H (Buenos Aires Underground), a metro line in Buenos Aires, Argentina
• The 404.7nm emission band from a Mercury-vapor lamp
• The calcium H line, an absorption line in the Sun's spectrum at 396.9nm
• Pencil skirt, sometimes called a H-line skirt

See also

• H band (disambiguation)