| The New Dictionary of Cultural Literacy, Third Edition. 2002. |
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| nitrogen |
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| A chemical element that makes up about four-fifths of the atmosphere of the Earth. Its symbol is N. | 1 |
| Like carbon, nitrogen is a necessary element in the tissues of living things. | 2 |
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| | | The New Dictionary of Cultural Literacy, Third Edition. Edited by E.D. Hirsch, Jr., Joseph F. Kett, and James Trefil. Copyright © 2002 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. |
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