
An ultramicrotome is a specialized microtome designed to cut extremely thin sections (ultra-thin sections) of specimens, typically for transmission electron microscopy (TEM)
Ultramicrotomy is a method for cutting specimens into extremely thin slices, called ultra-thin sections, that can be studied and documented at different magnifications in a transmission electron microscope (TEM). It is used mostly for biological specimens, but sections of plastics and soft metals can also be prepared.