nephelometer

neph·e·lom·e·ter

noun \ˌnef-ə-ˈläm-ət-ər\

Definition of NEPHELOMETER

: an instrument for measuring cloudiness: as a : a set of barium chloride or barium sulfate standards used for estimating the turbidity of a fluid and thereby the number of bacteria in suspension b : an instrument for determining the concentration or particle size of suspensions by means of transmitted or reflected light

—neph·e·lo·met·ric \ˌnef-ə-lō-ˈme-trik\ adjective