- 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
- 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
- Cricoid pressure
- Cricopharyngeal myotomy
- Cricopharyngeus muscle
- Cricothyroid joint
- Cricothyroid membrane
- Cricothyroid muscle
- Cricothyrotomy
- Crigler Najjar Syndrome Type I
- Crigler Najjar syndrome
- Crigler-Najjar syndrome
- Crime prevention
- Crimean Congo Hemorrhagic Fever
- Crimean-Congo hemorrhagic fever
- Crimean-Congo hemorrhagic fever virus
- Criminal profiling
- Crisaborole
- Crisis intervention
- Crista
- Crista ampullaris
- Crista galli
- Crista supraventricularis
- Crista terminalis
- Criterion-referenced tests
- Crithidia
- Crithidia fasciculata
- Crithidia luciliae
- Crithmum
- Critical Incident Technique
- Critical appraisal
- Critical band
- Critical care
- Critical care nursing
- Critical control point
- Critical illness
- Critical illness polyneuropathy
- Critical illness–related corticosteroid insufficiency
- Critical illumination
- Critical incident stress
- Critical incident stress management
- Critical limb ischemia
- Critical mass
- Critical periods
- Critical social work
- Critical thinking
- Crizotinib
- Crlx101
- Crocetin
- Crocidolite
- Crocus sativus
- Crofelemer
- Crohn's Disease Activity Index
- Crohn's disease
- Cromakalim
- Cronbach's alpha
- Cronkhite-Canada syndrome
- Cronobacter
- Cronobacter sakazakii
- Crospovidone
- Cross cultural psychology
- Cross education
- Cross fertilization
- Cross infection
- Cross linked polymer
- Cross linking reagent
- Cross modal plasticity
- Cross presentation
- Cross reaction
- Cross reactivity
- Cross resistance
- Cross syndrome
- Cross tolerance
- Cross validation
- Cross-cultural communication
- Cross-cultural psychiatry
- Cross-link
- Cross-matching
- Cross-presentation
- Cross-reactive carbohydrate determinants
- Cross-reactivity
- Cross-resistance
- Cross-sectional studies
- Cross-sectional study
- Cross-tolerance
- Cross-training