China 
Africa 
- Cotton seed oil
- Cotton wool spots
- Cottonseed
- Cottonseed oil
- Cottontail rabbit papillomavirus
- Cotyledon
- Couching
- Cough
- Cough center
- Cough reflex
- Coughing
- Coulter counter
- Coumaphos
- Coumarin
- Coumestrol
- Council for International Organizations of Medical Sciences
- Counseling
- Counseling psychology
- Counter immunoelectrophoresis
- Counter transference
- Counterconditioning
- Countercurrent
- Counterfactual thinking
- Counterfeit drugs
- Counterfeit medications
- Counterfeiting
- Counterimmunoelectrophoresis
- Counterions
- Counterirritants
- Counterproductive work behavior
- Counterpulsation
- Counterregulatory hormones
- Counterstain
- Counterstimulation
- Countertransference
- Counts per minute
- Coup contrecoup injury
- Coup-tfii
- Couple therapy
- Coupling constant
- Coupling reactions
- Courage
- Couroupita guianensis
- Couvelaire uterus
- Covariance
- Covariance function
- Covariance matrix
- Covariate
- Cover test
- Coverage error
- Covert attention
- Covid-19 vaccine Janssen
- Cow dung
- Cow milk
- Cow urine
- Cowden syndrome
- Cowpea
- Cowpeas
- Cowpox
- Cowpox virus
- Cox maze procedure
- Cox-2 inhibitors
- Coxa valga
- Coxa vara
- Coxiella
- Coxiella burnetii
- Coxiellaceae
- Coxsackie A virus
- Coxsackie b virus
- Coxsackie virus and adenovirus receptor
- Coxsackievirus
- CpG islands
- Crabtree effect
- Cracked nipples
- Cracked tooth syndrome
- Crackles
- Cramp fasciculation syndrome
- Cramps
- Cranberry
- Cranial cavity
- Cranial electrotherapy stimulation
- Cranial fossa
- Cranial nerve disorder
- Cranial nerve nuclei
- Cranial nerve palsies
- Cranial nerves
- Cranial neural crest
- Cranial sutures
- Cranial ultrasound
- Cranial vault
- Craniectomy
- Craniocerebral trauma
- Craniocervical instability
- Craniofacial abnormalities
- Craniofacial abnormality
- Craniofacial surgery
- Craniofacial syndrome
- Craniomaxillofacial trauma
- Craniometry
- Craniopharyngiomas
- Cranioplasty
- Craniosacral therapy
- Cranioschisis
- Craniosynostosis
- Craniotomy
- Crash cart
- Crataegus
- Crataegus monogyna
- Cravings
- Crazing
- Crazy Paving
- Cre recombinase
- Cre-Lox recombination
- Cream
- Creatine
- Creatine kinase
- Creatine phosphate
- Creatine transporter defect
- Creatininase
- Creatinine
- Creatinine clearance
- Creative process
- Creative therapy
- Creative thinking
- Creative visualization
- Creativity
- Creativity test
- Cremaster muscle
- Cremasteric artery
- Cremasteric reflex
- Cremophor
- Crenation
- Crenezumab
- Creosol
- Creosote
- Crepitus
- Crescent sign
- Cresol
- Crest syndrome
- Cresyl violet stain
- Cretinism
- Creutzfeldt-Jakob disease
- Cri du chat
- Cribriform fascia
- Cribriform plate
- Crico-arytenoid joint
- Cricoarytenoid joint
- Cricoarytenoid muscle
- Cricoarytenoid muscles
- Cricoid cartilage