9Y or 9-Y may refer to:
- 9 years
- 9Y, IATA airline code for Air Kazakhstan, which went bankrupt in 2004
- 9Y, international code identifying airplanes from the state of Trinidad and Tobago
- Salmson 9Y, a model of Salmson 9
- USP9Y, or Ubiquitin specific peptidase 9, Y-linked
- 9Y, Aircraft registration for Trinidad and Tobago
See also edit
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