Definitions for "Particle size"
As used in industry standards, the size of a particle suspended in water as determined by its smallest dimension, usually expressed in microns.
The maximum linear dimension of a particle as observed with an optical microscope or the equivalent diameter of a particle detected by an instrument. The equivalent diameter is the diameter of a reference sphere having known properties and producing the same response in the sensing instrument as the particle being measured.
the diameter, in millimeters, of suspended sediment or bed material. Particle-size classifications are: [1] clay: 0.00024-0.004 millimeters (mm); [2] silt: 0.004-0.062 mm; [3] sand: 0.062-2.0 mm; and [4] gravel: 2.0-64.0 mm.