- codominance
- crazed
- cow's head
- charles martin hall
- charles francis hall
- commissionaire
- chinese wistaria
- Chimariko
- Cocopa
- Cochimi
- Convallariaceae
- Colchicaceae
- creeping windmill grass
- chloris truncata
- calorimetry
- captain horatio hornblower
- Cricetus cricetus
- circulatory failure
- cardiovascular catheterization
- corticotropin
- corticotrophin
- counterproposal
- conization of cervix
- claustrophobe
- catachresis
- chiasmus
- chlorofluorocarbon
- corticoid
- cortisol
- capybara
- corticosteroid
- cation
- coelenterate
- cnidarian
- cryptocoryne
- class hydrozoa
- Crocuta crocuta
- conic waxycap
- calyx tube
- chalcid fly
- chalcid wasp
- chalcidfly
- conic
- canyon treefrog
- class hymenomycetes
- creeping st john's wort
- cryaesthesia
- cardiomyopathy
- class act
- caspase