tur·bi·dim·e·ter 
(tûr′bĭ-dĭmĭ-tər)
(tûr′bĭ-dĭmĭ-tər)n.
An instrument for measuring the loss in intensity of a light beam through a solution that contains suspended particulate matter.
turbi·di·metric (-də-mĕtrĭk) adj.
tur′bi·di·metri·cal·ly adv.
tur′bi·dime·try n.