C
- cabin
- cabin altitude
- cabin crew
- cabin crew member
- cabin supercharger
- cabotage
- calendar of coordination activities
- calibrated airspeed
- calibration
- california bearing ratio
- call sign
- camber
- canard
- canard airplane
- canard configuration
- candela
- canopy (1)
- canopy (2)
- cantilever
- cantilever beam
- cantilever wing
- capacitor discharge light
- carburetor
- cardiopulmonary resuscitation
- cargo
- cargo aeroplane
- cargo aircraft
- cargo aircraft only
- cargo area
- cargo compartment
- cargo door
- cargo flight
- cargo handling
- carrier
- carry-on baggage
- cartridge starter
- category A
- category B
- Category I operation
- Category II operation
- Category IIIA operation
- Category IIIB operation
- Category IIIC operation
- catering
- ceiling
- Celsius temperature
- center of gravity
- center of lift
- center section
- centre line
- centrifugal clutch
- centrifugal compressor
- centrifugal force
- centripetal force
- certificate of registration
- certification
- certified aerodrome
- chandelle
- changeover point
- channel wing
- charlie
- charter
- charter flight
- check-in
- check-in position
- check flight (1)
- check flight (2)
- checked baggage
- checklist
- checkpoint
- chevron marking
- child
- chord
- circadian rhythm
- circle-to-land maneuver
- circling approach
- circling guidance light(s)
- cirrocumulus
- cirrostratus
- cirrus
- civil aerodrome
- civil aircraft
- civil aviation authority
- Class A airspace
- Class B airspace
- Class C airspace
- Class D airspace
- Class E airspace
- Class F airspace
- Class G airspace
- clean configuration
- clear air turbulence
- clear type of ice formation
- clearance
- clearance delivery
- clearance limit
- clearance of goods
- clearway
- climb
- climb angle
- climb gradient
- climb indicator
- climb speed
- climbing shaft
- clipped wing
- closed fracture
- closed marking
- cloud and visibility OK
- cloud base
- cloud ceiling
- cloud dissipation
- cloud of operational significance
- cloud seeding
- cloud sheet
- cloud top
- cloudburst
- co-pilot
- cockpit
- cockpit canopy
- cockpit voice recorder
- code-sharing
- code (SSR)
- coefficient of friction
- coffin corner
- cold advection
- cold front thunderstorm
- collective
- collective pitch
- collective pitch control
- collision risk model
- combination aircraft
- combined vision system
- comity
- command and control link
- command post
- commencement of journey
- commercial aeroplane
- commercial air transport
- commercial air transport operation
- commercial transport aircraft
- commissary supplies
- common ICAO data interchange network
- common mark
- common mark registering authority
- common traffic advisory frequency
- communications contrôleur-pilote par liaison de données
- compacted snow
- comparable ground-based system
- competency
- competency element
- competency unit
- composite
- compressibility
- computer
- condensation trail
- conference communications
- configuration deviation list
- confined area
- confined space
- conflict
- congested area
- conical camber
- connecting flight
- connecting rod
- connection
- consignment
- contaminated runway
- contingency rating
- continuing airworthiness
- continuous descent operation
- continuous descent operations
- continuous monitoring approach
- continuous wave
- contour line
- contracting state
- control area
- control tower
- control zone
- controllability
- controllable-pitch propeller
- controlled aerodrome
- controlled airspace
- controlled flight
- controlled flight into terrain
- controller-pilot data link communications
- convective activity
- convective thunderstorm
- Convention on International Civil Aviation
- convulsion
- cooling system
- coordinated airport
- coordinated universal time
- coordination
- Coordination Committee
- coordination parameters
- coordinator
- corporate aviation
- corporate resource management
- correlator
- Cospas-Sarsat system
- coulomb
- counter-rotating rotor
- course deviation indicator
- course to an altitude
- cowl flap
- crab angle
- crack
- crashworthiness
- crew baggage
- crew member
- crew resource management
- critical altitude
- critical angle of attack
- critical elements
- critical engine
- critical incident
- cross-check
- cross-country flight
- crosswind
- crosswind approach
- crosswind component
- crosswind landing
- crosswind takeoff
- cruise
- cruise altitude
- cruise climb
- cruise flight
- cruise relief pilot
- cruising level
- cruising speed
- cuban eight
- cumulus
- cup anemometer
- curfew
- current data authority
- current flight plan
- customs
- cycles since overhaul
- cyclic pitch control
- cyclic redundancy check
- cyclone