HCN
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HCN may refer to:
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Science and mathematics
- HCN channel, a cellular ion channel
- Highly composite number, a type of integer
- Hydrogen cyanide, chemical with the formula Template:Chem
Transportation
- Halcyonair, a Cape Verdean airline
- Headcorn railway station, in England
- Hengchun Airport, in Taiwan
Other
- Health Communication Network, an Australian software company
- High Country News, an American newspaper