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What does ug stand for?

ug stands for Microgram (µg is more correct)

This definition appears very frequently and is found in the following Acronym Finder categories:

  • Science, medicine, engineering, etc.

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Other Resources:
We have 9 other meanings of ug in our Acronym Attic

Samples in periodicals archive:

In it, EPA proposed a standard that would allow 12 micrograms of particulate matter per cubic meter and would retain the 24-hour reading at 35 micrograms per cubic meter.
In particular, women who could become pregnant should take 400 micrograms of folic acid every day to reduce the risk of neural tube birth defects like spina bifida.
Fine particulates in smoke blowing in from the 17-day-old Day Fire in Ventura County topped more than 130 micrograms per cubic meter in early afternoon, according to monitoring by the Antelope Valley Air Pollution Control District, which issued a health advisory warning people to stay indoors and limit prolonged exertion.