heavy nitrogen

American  

noun

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

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Example Sentences

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

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

In the test acid he substituted heavy nitrogen for ordinary nitrogen.

From Time Magazine Archive

A gaseous compound of ammonia, rich in nitrogen, passes up through the tube; some condenses, trickles down and with each fall from cone to cone the concentration of heavy nitrogen becomes richer.

From Time Magazine Archive