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Definition of Nitrogen balance
1. Noun. The balance between the amount of nitrogen taken in (to the soil or the body) and the amount given off (lost or excreted).
Generic synonyms: Balance
Medical Definition of Nitrogen balance
1. The difference between the total nitrogen intake by an organism and its total nitrogen loss. A normal, healthy adult has a zero nitrogen balance, Nin Nout (i.e., a positive nitrogen balance. (05 Mar 2000)