systems biology

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The branch of biology that uses computational techniques to analyze and model how the components of a biological system such as a cell or organism interact with each other to produce the characteristics and behavior of that system.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun biology The systematic study of the complex interactions in biological systems
• noun by extension The study of the self-organizing behaviour of complex, dynamic non-biological systems