CR1 or CR-1 may refer to:
Vehicles
Aircraft
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Cessna CR-1, an American air racer
*
Fiat CR.1
The Fiat CR.1 was an Italian biplane fighter aircraft of the 1920s. Of wood-and-fabric construction, it was designed by Celestino Rosatelli, from whom it gained the 'CR' designation. Its most distinctive feature was that the lower wings were lon ...
, a 1920s Italian biplane fighter aircraft
Automobiles
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Climax CR1, a 2015 British sports car
* Aquila CR1, a 2008–present Danish race car
Other uses
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Complement receptor 1
Complement receptor type 1 (CR1) also known as C3b/C4b receptor or CD35 (cluster of differentiation 35) is a protein that in humans is encoded by the ''CR1'' gene.
This gene is a member of the regulators of complement activation (RCA) family a ...
, a protein
*
CR-1 visa, a United States immigrant visa that allows a spouse of a US citizen to enter as a conditional permanent resident
* CR-1 gene is about
Teratocarcinoma-derived growth factor 1
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