An entry in a contingency table that is certain to be zero, whatever the sample size, because it corresponds to an impossible outcome. The table shown contains three structural zeros (top right) as well as one random zero—a cell whose entry is zero by chance.
- Catherine of Braganza (1638–1705)
- cathetometer
- cathine
- cathinone
- cathode
- cathode dark space
- cathode follower
- cathode glow
- cathode-ray oscilloscope
- cathode rays
- cathode-ray tube
- cathodic protection
- cathodoluminescence
- Catholic emancipation
- Catholicism
- Catholic League
- cation
- cation exchange
- cation-exchange capacity
- cationic detergent
- cationic dye
- cationic resin
- cation ordering
- catkin
- Catmull–Clark surfaces