ultramicroscope

noun

1. an instrument that uses scattering phenomena to detect the position of objects too small to be seen by an ordinary microscope.

noun

1. a microscope used for studying colloids, in which the sample is strongly illuminated from the side and colloidal particles are seen as bright points on a dark backgroundAlso called: dark-field microscope

n.

1. A microscope with high-intensity illumination used to study very minute objects.