salinometer
noun
sa·li·nom·e·ter ˌsa-lə-ˈnä-mə-tər 
ˌsā-
: an instrument (such as a hydrometer) for measuring the amount of salt in a solution
Word History
Etymology
International Scientific Vocabulary saline + -o- + -meter
First Known Use
1844, in the meaning defined above
Medical Definition
salinometer
noun
sa·li·nom·e·ter ˌsal-ə-ˈnäm-ət-ər ˌsā-lə-
ˌsā-lə- : an instrument (as a hydrometer) for measuring the amount of salt in a solution