Final answer:
In medical terminology, 'percuss/o-' in the word 'percussion' means 'to strike'. This is part of a physical examination technique to assess the condition of organs.
Step-by-step explanation:
In the medical term percussion, the combining form percuss/o- means to strike. This term is often used to describe a method in physical examination where the surface of the body is tapped or struck to diagnose the condition of organs beneath. The sound produced by the strike can indicate the presence of normal or abnormal conditions within organs like the lungs or abdomen. For example, a dull sound might suggest the presence of fluid in the lungs, whereas a hollow sound could indicate normal, air-filled lungs.