what is infusions
Related to infusion: Intravenous infusion. [in-fuÂ´zhun] 1. the steeping of a substance in water to obtain its soluble principles. 2. the product obtained by this process. 3. the slow therapeutic introduction of fluid other than blood into a vein. See also intravenous infusion. note: An infusion flows in by gravity, an injection is forced in by a syringe, an instillation is dropped in, an insufflation is blown in, and an infection slips in unnoticed.