perm - phyt
- permafrost
- permafrost karst
- permafrost table
- permanent hardness
- permanent wilting point
- permeability
- permeability barrier
- permeability coefficient
- permeability tensor
- permeability, effective
- permeability, intrinsic
- permeability, relative
- permeability, specific
- permeability, transverse
- permeameter
- pervious
- petrography
- pH
