- cuscuta
- caligraphy
- coil spring
- cylinder press
- cyclical
- cream of magnesia
- continuous fever
- continuous centrifuge
- caudal analgesia
- croning method
- chloasma
- charged (with)
- choledocholithiasis
- cellular death
- concrete mixer
- cavo varus talipes
- committed sins
- crap shooter
- candidacy
- curvoccipital
- christensen unit
- cortical nystagmus
- captious
- chronic fever
- complete lawlessness or mismanagement
- contractually
- cord stump
- coddle
- craigie
- computerised
- computerized
- composition file
- convenorship
- concatenation character
- consanguineous
- clonic spasm
- chuck out of
- chuck off
- chonorchis
- conqueror of the world
- covering letter
- cover letter
- coding error
- chondrodystrophia calcificana congenita
- creutzfeld_jacob disease
- chondromalacia foetalis
- curl lip
- catch alight
- catch fire
- criticised