1. A device that feels and analyzes biological information: A biosensor is a device such as a thermometer which is used to assess or analyze the temperature of blood pressure, heart rate, or a more sophisticated determination of chemicals and enzymes in body fluids.

The biosensor can also be used in the laboratory or placed within the body.

2. A device to monitor and to transmit information about biological processes. such as the effect of motion on an animal in space: After many trials, the scientists developed a biosensor that worked in the weightlessness of the space capsule.