China 
Africa 
- Carnivore
- Carnivory
- Carnobacterium
- Carnosic acid
- Carnosine
- Carnosol
- Carnoy's solution
- Carob
- Caroli disease
- Carotene
- Carotenoids
- Carotid artery
- Carotid artery disease
- Carotid artery dissection
- Carotid artery stenosis
- Carotid artery stenting
- Carotid atherosclerosis
- Carotid body
- Carotid body tumor
- Carotid bruit
- Carotid canal
- Carotid cavernous fistula
- Carotid endarterectomy
- Carotid sheath
- Carotid sinus
- Carotid sinus massage
- Carotid sinus nerve
- Carotid sinus syndrome
- Carotid stenting
- Carotid ultrasonography
- Carotid-cavernous fistula
- Carotid-cavernous sinus fistula
- Carotidynia
- Carp
- Carpaine
- Carpal
- Carpal bone
- Carpal bones
- Carpal coalition
- Carpal tunnel
- Carpal tunnel syndrome
- Carpenter syndrome
- Carpometacarpal joint
- Carrageenan
- Carrier proteins
- Carrier testing
- Carrion's disease
- Carrot seed oil
- Carrots
- Carteolol
- Carthamin
- Carthamus tinctorius
- Cartilage
- Cartilage tumors
- Cartilage-hair hypoplasia
- Cartilaginous joint
- Cartwheel pattern
- Carum carvi
- Caruncle
- Carvacrol
- Carvedilol
- Carveol
- Carvone
- Caryophyllene
- Cas1
- Cas12a
- Cas2
- Cas3
- Cas4
- Cas9
- Cascade effect
- Cascade impactor
- Cascara
- Cascara sagrada
- Case Mix Index
- Case control study
- Case fatality rate
- Case finding
- Case history
- Case management
- Case presentation
- Case report form
- Case series
- Case study
- Case-control study
- Casein
- Casein free diet
- Casein kinase
- Caseworker
- Cashew fruit
- Casomorphin
- Casoni test
- Casopitant
- Casp
- Caspase
- Caspase 1
- Caspase 10
- Caspase 11
- Caspase 12
- Caspase 2
- Caspase 3
- Caspase 4
- Caspase 6
- Caspase 7
- Caspase 8
- Caspase 9
- Caspase activation and recruitment domain
- Caspase-11
- Caspase-2
- Caspase-8
- Caspase-9
- Caspase-activated DNase
- Caspase-activated dnase
- Caspofungin
- Cassava
- Cassia
- Cassia fistula
- Castanospermine
- Castleman disease
- Castleman's disease
- Castor oil
- Castration anxiety
- Casualty evacuation
- Cat bite
- Cat eye syndrome
- Cat fleas
- Cat scratch
- Cat scratch disease
- Cat-scratch disease
- Catabolism
- Catabolite repression
- Catalase
- Catalepsy
- Catalpol
- Catalysis
- Catalytic RNA
- Catalytic efficiency
- Catalytic triad
- Catamenial epilepsy
- Catamenial pneumothorax
- Cataplexy
- Cataract extraction
- Cataract surgery
- Cataract-microcornea syndrome
- Cataracts
- Catarrh
- Catastrophic antiphospholipid syndrome
- Catastrophic injury
- Catastrophizing
- Catatonia