Bionosis is a term used in biology to refer to the process by which living organisms are able to maintain a stable internal environment. The correct spelling of bionosis is /baɪ.əʊˈnəʊsɪs/, which is pronounced as "by-oh-NO-sis". The word is derived from the Greek words "bios", meaning life, and "nousis", meaning understanding. As such, bionosis refers to the processes by which living things are able to understand and adapt to changes in their environment in order to survive and thrive.
A disease due to some living pathogenic agent.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.