IPA: /pəˈlɛrɪˌmɛtri/
KK: /pəˈlɛrɪˌmɛtri/
The process of measuring the polarization of light or other electromagnetic waves using a special instrument called a polarimeter.
Scientists use polarimetry to study the properties of light in various materials.
Polarimetry → It is formed from "polar" (from Latin *polaris*, meaning of the poles) and "-metry" (from Greek *metria*, meaning measurement). The word refers to the measurement of the properties of light as it relates to the poles or angles of polarization.
Think of measuring something related to the 'poles' ('polar') and 'measurement' ('-metry') — that's what polarimetry means.