infusion

(in-fu’zhun). 1. (L. infu’sio; from in into + fun'dere to pour.] The steeping of a substance in water for obtaining its proximate principles. 2. [L. infu’sum, gen. infu’si.]) The product of the proce of steeping a drug for the extraction of its medicinal principles. 3. The therapeutic introduction of a fluid, as saline solution, into a vein. cold i., the product of steeping a drug in cold water. saline i., an injection, either subcutaneous or intravenous, of saline solution.