What is "polarimetry"

Polarimetry \Po`lar*im"e*try\, n. (Opt.) The art or process of measuring the polarization of light.

n. 1 (context physics English) The measurement of the polarization of electromagnetic radiation 2 (context chemistry English) Analysis using a polarimeter

Polarimetry is the measurement and interpretation of the polarization of transverse waves, most notably electromagnetic waves, such as radio or light waves. Typically polarimetry is done on electromagnetic waves that have traveled through or have been reflected, refracted, or diffracted by some material in order to characterize that object.