You searched for: “ultramicroscopy
ultramicroscope, ultramicroscopy
1. A microscope with high-intensity illumination used to study very minute objects, such as colloidal particles that scatter the light and appear as bright spots against a dark background.
2. A microscope that uses scattered light to make submicroscopic objects visible.
3. A microscope that uses light diffraction to permit the viewing of objects too small to be detected by an ordinary microscope.