OpenSimulator Archive. OAR file is an OpenSimulator Archive. OpenSimulator is an open source multi-platform, multi-user 3D application server. It can be used to create a virtual environment (or world) which can be accessed through a variety of clients, on multiple protocols.
biological adaptation the adaptation of living things to environmental factors for the ultimate purpose of survival, reproduction, and an optimal level of functioning. color adaptation. 1. changes in visual perception of color with prolonged stimulation.
Another definition for physiologic adaptation is when a cell undergoes an adjustment in response to a stimulus, allowing it to be better adjusted to its environment. This doesn't just apply to cells; tissues and various organisms can have physiological adaptations, as well. Plants can have physiological adaptations, too.