Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Previous word: nitrogen balance
Next word: nitrogen equilibrium
Definition of: nitrogen cycle
Biol.
The sequence of physical and chemical processes by which atmospheric nitrogen is taken into the soil, utilized by plants and animals, and eventually returned to the atmosphere.
Comment about this word, ask questions, or add new information about this topic: