Yn is a letter of the old Romanian Cyrillic alphabet.
YN or Yn may also refer to:
- Yeoman (United States Navy), a rank
- A US Navy hull classification symbol: Yard net tender (YN)
- Yoctonewton, a unit of force equal to 10−24 newtons
- Yottanewton, a unit of force equal to 1024 newtons
- Triple bond, in a chemical compound
- 2C-YN, an analogue of the phenethylamine derived hallucinogen 2C-E
- Yes–no question
- Yunnan, a province of China (Guobiao abbreviation YN)
- Y/N, a 2023 novel by Esther Yi
This disambiguation page lists articles associated with the title Yn.
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