frac - gas
- fraction
- fraction collector
- fractional composition of petroleum
- fractional crystallization
- fractional decomposition
- fractional dissolution
- fractional distillation
- fractional extraction
- fractional neutralization
- fractional precipitation
- fractional sterilization
- fractional sublimation
- fractionating column
- fractionating flask
- fractionating tower
- fractionating tube
- fractionation
- frame filter press
- francium
- franck hertz's experiment
- free acid
- free alkali
- free carbon
- free convection
- free electron model
- free energy
- free energy at constant pressure
- free energy of activation
- free expansion
- free heat convection
- free moisture
- free path
- free radical
- free radical initiation
- free radical reaction
- free sulfur
- free surface
- free valence
- free volume
- free water
