microgram

¹ American  

[mahy-kruh-gram] / ˈmaɪ krəˌgræm /

especially British, microgramme

noun

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

---

microgram ² American  

[mahy-kruh-gram] / ˈmaɪ krəˌgræm /

noun

1. micrograph.

---

Etymology

Origin of microgram¹

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

Origin of microgram²

micro- + -gram ¹

Example Sentences

GSNR’s project would raise pollution levels by roughly 1 microgram per cubic meter for the duration of its operations in the port area.

From Los Angeles Times • Dec. 1, 2024

"One microgram per meter cubed might sound fairly small, but we have to think about how people are exposed to wildfire smoke," Casey said.

From Science Daily • Nov. 25, 2024

But restrictions on only two products are in place, one relating to Utrogestan and the second for Progynova 100 microgram patches.

From BBC • May 20, 2023

They found that peanut, cashew, hazelnut, walnut, milk, and sesame allergens were incredibly low in the SpoonfulOne food puffs: less than 1 microgram of food allergen per gram of food puff.

From Slate • Feb. 6, 2023

In the course of these investigations, balances that would weigh up to 10.5 mg with a sensitivity of 0.02 microgram were developed.

From A Brief History of Element Discovery, Synthesis, and Analysis by Watson, Glen W.