The term biotic means "of or relating to living organisms," according to Dictionary.com. Compare this with the opposite term abiotic, which pertains to non-living organisms or factors.
In the study of ecology, influences on an ecosystem can be subdivided into biotic factors and abiotic factors. A biotic factor is an influence or effect caused by an organism. For example, the introduction of a new predator into an ecosystem is a kind of biotic factor.
An abiotic factor is a nonbiological influence that plays a role in an ecosystem. Examples of abiotic factors include weather and natural disasters, such as a forest fire.