C18
C18 stands for:
- Chrysler C18 , a 1938 car model
- a radioactive isotope of carbon
- Combat 18 , a neo-Nazi terrorist organization
- Main road C18 , a street in Namibia
- a certain type of chromatography material, based on silica gel and octadecylsilanes
- a character from the Dragonball Z universe
- Caldwell 18 , a galaxy from the Caldwell catalog