normal saline (NS) solution

nor·mal sa·line (NS) so·lu·tion

(nōr'măl sā'lēn sŏ-lū'shŭn)
A sterile solution of 0.9% w/v (grams of solute per mL of solution) sodium chloride in water, considered to be isotonic with blood; used IV for dehydrated patients who cannot take fluids orally.
Synonym(s): normal saline.