hyperosmolarity

noun

hy·​per·​os·​mo·​lar·​i·​ty -ˈlar-ət-ē 

plural hyperosmolarities

: the condition especially of a bodily fluid of having abnormally high osmolarity

hyperosmolarity occurs in dehydration, uremia, and hyperglycemia with or without ketoacidosis

—R. W. P. Cutler

hyperosmolar

ˌhī-pə-ˌräz-ˈmō-lər 

adjective