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IU

American  
  1. immunizing unit.

  2. Also I.U. international unit.


IU British  

abbreviation

  1. immunizing unit

  2. international unit

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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IU scientists have contributed to building detector systems, interpreting data, and mentoring young researchers.

From Science Daily ● Mar. 3, 2026

“The IU football team, it’s a real team,” Hoosier quarterback Fernando Mendoza said after flattening the Niketown Waterfowl.

From The Wall Street Journal ● Oct. 13, 2025

In a delightful bit of magical TV storytelling, K-pop superstar IU plays both the young adult Ae-sun and later her own grown daughter.

From Salon ● Jun. 28, 2025

The two-and-a-half-hour show ended with a half-hour encore, during which IU scanned the crowd for fan-made signs of songs they wanted to hear.

From Los Angeles Times ● Aug. 5, 2024

“I mean, it’s less than half of what IU would cost,” which was the state school a couple hours south of us in Bloomington.

From "Turtles All the Way Down" by John Green

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