What does "saccharimeter" mean?

Saccharimeter: An instrument for ascertain the quantity of saccharine matter in any solution, as the juice of a plant, or brewers' and distillers' worts. [Written also saccharometer.] Note: The common saccharimeter of the brewer is an hydrometer adapted by its scale to point out the proportion of saccharine matter in a solution of any specific gravity. The polarizing saccharimeter of the chemist is a complex optical apparatus, in which polarized light is transmitted through the saccharine solution, and the proportion of sugar indicated by the relative deviation of the plane of polarization.