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heavy nitrogen

American  

noun

  1. the stable isotope of nitrogen having a mass number of 15.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

According to the study, this type of abrupt decline is common in regions that have experienced heavy nitrogen pollution for decades, including parts of Europe, eastern China, and the eastern United States.

From Science Daily • Jun. 2, 2026

Corn generally requires heavy nitrogen application, while soybeans, as legumes, can fix much of their own nitrogen and often need little or no added fertilizer.

From Barron's • Mar. 31, 2026

For example, as trees and mutualistic fungi work together, a larger proportion of heavy nitrogen isotopes are left in the fungi, as heavy isotopes are more difficult to move.

From Science Daily • Oct. 23, 2023

After two years of work he and his associates have produced 20 grams of heavy nitrogen in 2�% concentration, 400 grams of lower concentrations.

From Time Magazine Archive

Last week Dr. Urey announced production in experimental quantities of another overweight element � heavy nitrogen, which weighs 15 units to 14 for ordinary nitrogen.

From Time Magazine Archive

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