The word interActor refers to an object that is placed on a slide or 'stage' during web conferencing or other remote presentation. The concept is that the element is interactive and all members in an audience may interact with it.

An interactor is a part of an organism that natural selection acts upon. Interactors are the individual evolutionary paths which are subject to real-life interactions, such as phenotype and the outward traits most affected by natural selection. In this way the interactor interacts with the environment in a way which creates differential reproduction.