an instrument for determining the extent to which plane-polarized light of various wavelengths is rotated by certain solutions, consisting of a combination of a spectroscope and a polarimeter.
Main Entry: spec·tro·po·lar·im·e·ter Pronunciation: -"pO-l&-'rim-&t-&r Function: noun : a combinedspectroscope and polarimeter that is used for the determination of the rotatory power of solutions at different wavelengths
[spek-troh-poh-luh-rim-i-ter] 
troʊˌpoʊ