en
IU
/ˌaɪˈjuː/
Definition
1
Abbreviation for 'International Unit', a standardized measure of the biological activity or effect of a substance, such as vitamins, hormones, or drugs.
2
Abbreviation for 'intrauterine', as in certain medical contexts.
Examples
My doctor upped my vitamin D to 5,000 IU a day, turning breakfast into a biochemistry experiment.
That energy drink packs 100 IU of B12, enough to power a small robot – or just me through Monday.
She collects vintage vitamin bottles boasting 400 IU labels, calling it her 'retro health squad'.
Prescribed a million IU of vitamin A for night blindness, now my carrots are jealous.