- C-peptide
- C-symmetry
- C-terminal
- C-terminal telopeptide
- C-type lectins
- C11
- C2
- C2c12
- C3d
- C5a
- C7
- C70
- C99
- CA-125
- CAAD
- CAB
- CAC
- CAD
- CAD data exchange
- CAE
- CAES
- CAFE
- CAFM
- CAFS
- CAGR
- CAIDI
- CALPHAD
- CALPUFF
- CAM
- CAN bus
- CANDU
- CANDU reactor
- CANopen
- CAP
- CAP theorem
- CAPE
- CAPM
- CAR
- CAR T cell
- CAREM
- CAS
- CAS Registry Numbers
- CAS numbers
- CASBEE
- CASTEP
- CATI
- CATIA
- CAUTI
- CAVLC
- CAx