saline solution

This term is primarily used in clinical and medical settings to describe a specific concentration of salt in water that mimics the osmotic pressure of human body fluids. While "saline" can be used as a shorthand noun in casual medical jargon, the full phrase "saline solution" is the standard formal designation for the substance.

Because it is treated as a specific chemical mixture or a bulk medical supply, it is typically used as an uncountable noun. When referring to individual units, practitioners use partitive constructions such as "a bag of saline solution" or "a vial of saline solution" rather than pluralizing the term itself.