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.
Biological medications, often called biologics, are a relatively new type of medication for asthma. Compared to most medications that are made using chemical reactions, biologics are made using living systems (e.g., bacterial/viral cells, plant or animal cells).