C9
C9, C09 or C-9 may refer to:
Biology, medicine, and chemistry[edit]
- C9 (Complement component 9), a protein
- ATC code C09, a subgroup of the Anatomical Therapeutic Chemical Classification System
- C09, ICD-10 code for malignant neoplasm of tonsil
- Carbon-9 (C-9 or 9C), an isotope of carbon
Military and weapons[edit]
- Hi-Point Models C9 and C9 Comp handguns
- C9 LMG, Canadian light machine gun
- C9, an ID for the German Nachtjagdgeschwader 5 air squadron in World War II
Music[edit]
- C9, a note five octaves above Middle C
- C9, a C ninth chord
Organizations[edit]
- Cloud9, an American esports organization
- C9 League, an association of Chinese universities
- The Council of Cardinal Advisers, an advisory body to the pope, originally comprising nine members
- C9 Entertainment, a South Korean entertainment company and record label
Transportation[edit]
- Cierva C.9, a 1927 British experimental autogyro
- HMS C9, a British submarine
- Ford C-9, a US military designation for the Ford Trimotor aircraft
- McDonnell Douglas C-9, a US Air Force transport aircraft based on the civilian DC-9
- USS Montgomery (C-9), a US Navy cruiser
- C9, the IATA code for Cirrus Airlines
- Sauber C9, a Le Mans racing car
- C9 engine, by Caterpillar Inc.
- C-9 (Cercanías Madrid), a commuter rail line in Madrid
- LNER Class C9, a class of 2 British steam locomotives rebuilt from C7s in 1931
- SL C9, a type of rolling stock used in the Stockholm metro
Other uses[edit]
- C9, an ISO 216 standard paper size
- C9, a holiday light bulb size
- C9, a sportswear line by Champion
See also[edit]
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
If an internal link led you here, you may wish to change the link to point directly to the intended article.
If an internal link led you here, you may wish to change the link to point directly to the intended article.