microgram

¹

[ mahy-kruh-gram ]

noun

1. a unit of mass or weight equal to one millionth of a gram, used chiefly in microchemistry. : μg

microgram

²

[ mahy-kruh-gram ]

noun

1. micrograph ( def 2 ).

Word History and Origins

Origin of microgram¹

First recorded in 1885–90; micro- + -gram ²

Origin of microgram²

micro- + -gram ¹

Example Sentences

Gordon and his colleagues found that the PATH system had the highest levels of pollution, with an average particle concentration of 779 micrograms per cubic meter.

From Popular-Science

Once again, the PATH system had the highest average particle concentration, at 1,020 micrograms per cubic meter.

From Popular-Science

New York’s subway system had an average fine particle concentration of 548 micrograms per cubic meter.

From Popular-Science

Given that the dirtiest and cleanest neighborhoods in New York City have an annual difference of about 4 micrograms per cubic meter, areas near heavy industries net a lot more deadly infections.

From Popular-Science

The United States’ standard is below that of the World Health Organization, which recommends a limit of 10 micrograms per cubic meter as an annual average.

From Popular-Science

It was balanced to a microgram—to a millionth of the combined weight of three aspirin tablets.

From Project Gutenberg