1. Not changed in form or character for a purpose 
2. Not having adapted to new conditions
   - unadjusted

See also: maladjusted, unmodified

• genus Crangon
• genus Craspedia
• genus Crassostrea
• genus Crassula
• genus Crataegus
• genus Crateva
• genus Crax
• genus Crepis
• genus Crescentia
• genus Crex
• genus Cricetus
• genus Crocethia
• genus Crocodilus
• genus Crocodylus
• genus Crocus
• genus Crocuta
• genus Cronartium
• genus Crotalaria
• genus Crotalus
• genus Crotaphytus
• genus Croton
• genus Crotophaga
• genus Cryptacanthodes
• genus Cryptobranchus
• genus Cryptocercus