D defs.my
Entry 1 sense Webster, 1913

Polarimeter

/pōlˌ-ẽr-ĭm'-ət-ẽr/ · Po·lar·im·e·ter · IPA /pˌoʊlərˈɪmətər/
01 n. An instrument for determining the amount of polarization of light, or the proportion of polarized light, in a partially polarized ray.
  1. 1.
    An instrument for determining the amount of polarization of light, or the proportion of polarized light, in a partially polarized ray.(Opt.)