- Camphene
- Camphor
- Cannabinoid Hyperemesis Syndrome
- Cannabinoids
- Cannabis
- Cannon
- Capsule
- Carb
- Carb cap
- Carding
- Carene
- Carpet weed
- Cartridge
- Caryophyllene
- Cashed
- CB1 receptor
- CB2 receptor
- CBC
- CBD
- CBD oil
- CBDA (cannabidiolic acid)
- CBDV (cannabidivarin)
- CBGA (cannabigerolic acid)
- CBL (cannabicyclol)
- CBLA (cannabicyclolic acid)
- CBN (cannabinol)
- Cedrene
- Certificate of analysis
- Cheeba
- Cherried
- Chronic
- Circ perc
- Citronellol
- Clone
- Closed-loop system
- Co-op
- CO2
- CO2 extraction
- CO2 oil
- Cola
- Combustion
- Concentrate slurry
- Concentrates
- Cone
- Convection
- Cottonmouth
- Cotyledon leaves
- Creeper
- Cross
- Crumble
- Crystalline
- Cultivar
- Cultivation
- Cure
- Cymene