IV I. abbreviation 1.often not capitalized increased value 2.often not capitalized initial velocity 3. intravenous 4.often not capitalized[Latin in verbo; in voce] under the word 5.often not capitalized invoice value 6. iodine value II. \¦īˈvē\noun (-s) Etymology:intravenous : an apparatus used to administer an intravenous injection or feeding < the patient was hooked up to an IV > also : such an injection or feeding