Z0

Z0, Z0 or Z0 may refer to:


 * Characteristic impedance, a ratio used in electronics
 * Impedance of free space, a physical constant
 * Z boson, an elementary particle that mediates the weak force
 * a rare rail transport modelling scale
 * Roughness length, a factor used in wind speed calculations
 * Z0 sex-determination system in some moth species, also referring to biological females under this system