Injection n.
Introduction into the body of drugs or other fluids by means of syringe, usually drugs that would be destroyed by the digestive process if taken by mouth. Common routes for injection are into the skin (intracutaneous or intradermal); below the skin (subcutaneous), e.g. for insulin; into a muscle (intramuscular), for drugs that are slowly absorbed; and into a vein (intravenous), for drugs that are rapidly absorbed.
¹ The Bantam Medical Dictionary, Revised Edition, (Market House Books, Copyright ©1981, 1990) 223
Introduction into the body of drugs or other fluids by means of syringe, usually drugs that would be destroyed by the digestive process if taken by mouth. Common routes for injection are into the skin (intracutaneous or intradermal); below the skin (subcutaneous), e.g. for insulin; into a muscle (intramuscular), for drugs that are slowly absorbed; and into a vein (intravenous), for drugs that are rapidly absorbed.
¹ The Bantam Medical Dictionary, Revised Edition, (Market House Books, Copyright ©1981, 1990) 223