natu - non-
- natural ageing
- natural asphalt
- natural binary code
- natural cast
- natural cement
- natural circulation boiler
- natural coke
- natural convection
- natural diving
- natural draught
- natural dye
- natural environment
- natural fibre
- natural frequency
- natural gas
- Natural Gas Liquids
- natural gasoline
- natural glass
- natural grass
- natural ground
- natural harbour
- natural injection
- natural insecticide
- natural iron oxide
- natural isotope
- natural join
- natural language
- natural lighting
- natural liquid
- natural logarithm
- natural magnet
- natural mapping
- natural motions
- natural number
- natural period
- natural person
- natural product
- natural radiation
- natural radioactivity
- natural radiocarbon
