1) Blood vessel 2) Directly into the bloodstream 3) Endovenous 4) Injection adjective 5) Within a vein 6) Within or by means of a vein 1) Endovenous 
• (a.) Within the veins.
(IV) An injection into the vein.
Into or within a vein. Intravenous usually refers to a way of giving a drug or other substance through a needle or tube inserted into a vein. Also called IV.
Injection into the vein; I.V. 
Into the vein: Mainly used with reference to injections given into the vein. Substances injected in this way include some anaesthetic agents.
(in″trә-ve´nәs) within a vein.
refers to giving medicines or fluids directly through a vein
A method of introduction of a substance directly into the vein of a test animal.A term which means inside a vein. Intravenous injections are given into a vein.
In`tra·ve'nous adjective Within the veins. 
In the vein
(IV, I.V., i.v.) Type: Term Pronunciation: in′tră-vē′nŭs Definitions: 1. Within a vein or veins. Synonyms: endovenous
Intravenous (IV) means the injection of blood, drugs or fluids into the bloodstream through a vein.
A medical method of supplying fluids and medications into the bloodstream. Women that want pain-relief during labor may request intravenous medication. Medications that are given intravenously into a vein or muscle will help dull pain but will not eliminate it completely. An obstetrician must approve the medication and may limit the amount that...
Direct injection of medication into a vein.
inside of or into a vein 
endovenous adjective within or by means of a vein; `an intravenous inflammation`; `intravenous feeding`
injection into a vein
IV. Giving a drug or other substance into a vein for a rapid effect.
Through a vein.
introducing a fluid into the bloodstream through a vein (usually in the patient's forearm).(IV) a method of giving medication or fluids directly into the vein.(IV) a thin, plastic tube inserted into a vein (usually in the patient's forearm) through which a volume of fluid is injected into the bloodstream.