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• IV
  IV

  noun

  an intravenous device for delivering electrolyte solutions, medicines, and nutrients.
• i.v.
  i.v.

  abbreviation

  increased value.
• I.V.
  I.V.

  abbreviation

  initial velocity.

IV

¹ American  

[ahy-vee] / ˈaɪˈvi /

noun

IVs, plural IV's plural

1. an intravenous device for delivering electrolyte solutions, medicines, and nutrients.

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IV ² American  

abbreviation

1. intravenous.

2. intravenous drip.

3. intravenous injection.

4. intravenously.

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i.v. ³ American  

abbreviation

1. increased value.

2. initial velocity.

3. invoice value.

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I.V. ⁴ American  

abbreviation

1. initial velocity.

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i.v. British  

abbreviation

1. intravenous(ly)

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Other Word Forms

Inflected Forms

noun

• IV's
  plural
• IVs
  plural

Etymology

Origin of IV

First recorded in 1950–55

Example Sentences

Prada is responsible for the inner garment that is designed to distribute chilled water across the body during the eight-hour spacewalks on the Moon planned as part of the subsequent Artemis IV mission.

From BBC • Jun. 9, 2026

Fremont 2, Hamilton 0: The Pathfinders won the City Section Division III championship, their first since 1992, behind the standout pitching from senior James Harris IV, who threw a complete game.

From Los Angeles Times • May 23, 2026

The event belonged to a category known as Type IV radio bursts.

From Science Daily • May 23, 2026

I didn’t keep up with the franchise—somewhere around GTA IV, I got married, and before long I was immersed in an even more chaotic open-worlder called parenting.

From Barron's • May 21, 2026

He walked carefully, pushing an IV pole along with him.

From "The Season of Styx Malone" by Kekla Magoon