( n. )
An instrument for measuring the diameters of minute particles or fibers, from the size of the colored rings produced by the diffraction of the light in which the objects are viewed.
( n. )
An instrument for measuring the diameters of minute particles or fibers, from the size of the colored rings produced by the diffraction of the light in which the objects are viewed.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012