microgram

noun

mi·​cro·​gram ˈmī-krə-ˌgram 

: one millionth of a gram see Metric System Table

Examples of microgram in a Sentence

Recent Examples on the Web

How Much Vitamin D to Take Per Day The recommended dietary allowance (RDA) for vitamin D for healthy people ages 1 to 70 years is 600 IU, or 15 micrograms (mcg), per day. —Jamie Johnson, Verywell Health, 29 Jan. 2026

In about 7 ounces (200 grams) of orange juice, there are 58 micrograms of folate, while the same amount of red grapefruit juice contains 38 micrograms. —Zia Sherrell, Health, 21 Jan. 2026

The air quality change allowed 9 micrograms of fine particulate matter per cubic meter, which was a decrease from 12 micrograms of fine particulate matter per cubic meter. —Maya Wilkins, Chicago Tribune, 17 Jan. 2026

Up to 70% of all neural tube birth defects can be prevented when people consume 400 micrograms of folic acid prior to conception, according to the California Department of Public Health. —Veronica Fernandez-Alvarado january 12, Sacbee.com, 12 Jan. 2026

Word History

Etymology

International Scientific Vocabulary

First Known Use

circa 1890, in the meaning defined above

Rhymes for microgram

• abraham
• anagram
• cablegram
• cofferdam
• dendrogram
• diagram
• diaphragm
• epigram
• hexagram
• histogram
• hologram
• instagram

Medical Definition

microgram

noun

mi·​cro·​gram ˈmī-krə-ˌgram 

1

: one millionth of a gram

2

: micrograph sense 1