cryoscopy
noun
cry·os·co·py krī-ˈä-skə-pē 
: the determination of the lowered freezing points produced in liquid by dissolved substances in order to determine molecular weights of solutes and various properties of solutions
cryoscopic
ˌkrī-ə-ˈskä-pik
adjective 
Word History
Etymology
cryo- + -scopy (after French cryoscopie)
First Known Use
1885, in the meaning defined above
Medical Definition
cryoscopy
noun
cry·os·co·py krī-ˈäs-kə-pē
plural cryoscopies
: the determination of the lowered freezing points produced in liquid by dissolved substances in order to find the molecular weights of solutes and various properties of solutions