What Does HL Stand For?

HL has more than one possible meaning :

• HL - Half Life
• HL - Hardline
• HL - Hectolitre
• HL - Heel Line
• HL - High Level
• HL - Hinge Line
• HL - Holding Line
• HL - Hydrogen Line
• HL - Mustard Lewisite Mixture

If you know of another acronym for HL, please suggest it as a new acronym for HL.