China 
Africa 
- Camber thrust
- Camel case
- Camel hair
- Camellia
- Camera
- Camera Link
- Camera calibration
- Camera matrix
- Camera obscura
- Camera phone
- Camera stabilizer
- Camless
- Camostat
- Campaign to stop killer robots
- Campbell diagram
- Campesterol
- Camphene
- Camphor
- Camphorquinone
- Camphorsulfonic acid
- Camptothecin
- Campus network
- Campylobacter
- Campylobacter jejuni
- Campylobacter lari
- Campylobacteriosis
- Cams
- Camshaft
- Camunda
- Canada balsam
- Canal lining
- Canals
- Canard
- Canary Current
- Cancer
- Cancer biomarkers
- Cancer clusters
- Cancer genetics
- Cancer immunology
- Cancer immunotherapy
- Cancer pain
- Cancer registry
- Cancer staging
- Cancer stem cells
- Cancer treatment
- Cancer vaccines
- Cancer-associated fibroblasts
- Cancer-related fatigue
- Cancrinite
- Candela
- Candelilla wax
- Candida
- Candida krusei
- Candidate genes
- Candidatus Brocadia Anammoxidans
- Candidiasis
- Canine distemper
- Canine parvovirus
- Canker
- Cannabidiol
- Cannabinoid receptors
- Cannabinol
- Cannabis
- Canning
- Cannons
- Canny edge detector
- Canonical analysis
- Canonical correlation
- Canonical ensemble
- Canonical form
- Canonical quantization
- Canopy interception
- Canthal
- Canthaxanthin
- Cantilever method
- Cantilevers
- Cantor Set
- Canvas
- Canyons
- Cap carbonate
- Cap-and-trade
- Capability
- Capacitance
- Capacitance meter
- Capacitance probe
- Capacitive coupling
- Capacitive deionization
- Capacitive displacement sensors
- Capacitive sensing
- Capacitively coupled plasma
- Capacitor voltage transformer
- Capacitor-input filter
- Capacitors
- Capacity building
- Capacity credit
- Capacity factor
- Capacity loss
- Capacity management
- Capacity utilization
- Capillaries
- Capillary
- Capillary action
- Capillary bridges
- Capillary condensation
- Capillary electrochromatography
- Capillary electrophoresis
- Capillary fringe
- Capillary leak syndrome
- Capillary number
- Capillary pressure
- Capillary surface
- Capillary waves
- Capital
- Capital budgeting
- Capital cost
- Capital expenditure
- Capital goods
- Capitalism
- Capitate
- Capnography
- Capric acid
- Capricorn Plate
- Caprock
- Caproic acid
- Caprolactam
- Caprolactone
- Caprylic acid
- Capsaicin
- Capsanthin
- Capsids
- Capstan
- Capsule endoscopy
- Capsule neural network
- Capsules
- Capsulorhexis
- Capsulotomy
- Captan
- Captchas
- Captive bubble method
- Captopril
- Car
- Car controls
- Car phones
- Car seat
- Car suspension
- Car-t
- CarPlay
- Caramel
- Carat
- Carbamate