CM, Cm, cM or cm may stand for: Places Cameroon, which has the ISO and FIPS country code "CM" .cm, the country code top-level domain for Cameroon Chelmsford, which has the British post code "CM" Science Curium, a synthetic chemical element with the symbol "Cm" and atomic number 96 Crystal Meth, Methamphetamine Coulomb-metre, SI unit of electrical dipole moment (symbol Cm) Centimetre, a unit of length equal to one hundredth of a meter Centimorgan, a unit of recombinant frequency for… (More on Cm)