1. A person who uses a diagnostic procedure to listen to sounds within a person's body; An auscultator is an individual who uses a procedure for detecting certain defects or conditions by listening for normal and abnormal heart, breath, bowel, fetal, and other sounds in the body.
2. An instrument used to listen to sounds within the body; a stethoscope: Dr. Green asked the nurse to give him an auscultator so that he could detect any irregular and strange noises within Janet's body.