ultramicroscopeEnglishOxford Dictionary of Englishultramicroscope /ˌʌltrəˈmʌɪkrəskəʊp / ▸ noun an optical microscope used to detect particles smaller than the wavelength of light by illuminating them at an angle and observing the light scattered by the Tyndall effect against a dark background.
EnglishOxford Dictionary of English
