intromission, insertion, introduction - the act of putting one thing into another

epidural injection - injection of an anesthetic substance into the epidural space of the spinal cord in order to produce epidural anesthesia

solution - a homogeneous mixture of two or more substances; frequently (but not necessarily) a liquid solution; "he used a solution of peroxide and water"

intradermal injection - an injection into the skin

intramuscular injection - an injection into a muscle

intravenous injection - an injection into a vein

subcutaneous injection - an injection under the skin

medical aid, medical care - professional treatment for illness or injury