C4
C4, C04, C.IV, C-4, or C-04 may refer to:
People
C4 (rapper), a rap music producer from Birmingham, England
Biology
C4 carbon fixation, a pathway for carbon fixation in photosynthesis
ATC code C04 Peripheral vasodilators, a subgroup of the Anatomical Therapeutic Chemical Classification System
Cervical vertebra 4, one of the cervical vertebrae of the vertebral column
Cervical spinal nerve 4, a nerve originating in the neck
Apolipoprotein C4, a human gene
Complement component 4, a protein
C04, Oral cancer ICD-10 code
Vehicles
Aircraft
AEG C.IV, a German World War I reconnaissance aircraft
AGO C.IV, a 1917 German reconnaissance aircraft
Cierva C.4, a 1922 Spanish experimental autogyro
DFW C.IV, a 1916 German reconnaissance aircraft
Flight Design C4, a four-seat light aircraft
Fokker C.IV, a 1923 Dutch two-seat reconnaissance aircraft
Rumpler C.IV, a 1917 German single-engine, two-seater reconnaissance biplane
C-4 Argonaut, a Canadair aircraft derived from the Douglas DC-4
C-4, the US Army designation of the Ford Trimotor
