scanning Definition

to read or mark so as to show metrical structure

to examine by point-by-point observation or checking:

to investigate thoroughly by checking point by point and often repeatedly

an electron microscope in which a beam of focused electrons moves across the object with the secondary electrons produced by the object and the electrons scattered by the object being collected to form a three-dimensional image on a display screen —called also scanning microscope

a microscope that makes use of the phenomenon of tunneling electrons to map the positions of individual atoms in a surface or to move atoms around on a surface

ct scan

a cross-sectional, three-dimensional image of an internal body part produced by computed tomography chiefly for diagnostic purposes —called also CAT scan

a sectional view of the body constructed by positron-emission tomography