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(jÄ«â²rÉ-skÅpâ²) An instrument consisting of a disk or wheel that spins rapidly about an axis like a top. The spinning motion keeps the axis fixed even if the base is turned in any direction, making the gyroscope an accurate navigational instrument and an effective stabilizing device in ships and airplanes.
Medical Definition of Stethoscope. Stethoscope: An instrument that is used to transmit low-volume sounds such as a heartbeat (or intestinal, venous, or fetal sounds) to the ear of the listener. A stethoscope may consist of two ear pieces connected by means of flexible tubing to a diaphragm that is placed against the skin of the patient. The stethoscope has become one of the symbols of the medical profession.