Definition of ABSTRACT EXPRESSIONISM. : an artistic movement of the mid-20th century comprising diverse styles and techniques and emphasizing especially an artist's liberty to convey attitudes and emotions through nontraditional and usually nonrepresentational means. â abstract expressionist noun or adjective often capitalized A&E.ADVERTISEMENT. an artistic movement of the mid-20th century comprising diverse styles and techniques and emphasizing especially an artist's liberty to convey attitudes and emotions through nontraditional and usually nonrepresentational means.
SEM Micrograph of Red Blood Cells, Which are About 5 microns in Diameter. A micron is an abbreviated term for micrometer, or a millionth of a meter (1/1,000,000 meters). This is about .00004 inches. For Size comparison, a human red blood cell is about 5 microns across. A human hair is about 75 microns across (depending on the person). Bacteria can be between about .2 microns and 3 microns in size.
The micron or micrometer is a unit of measure for the core in optical fiber, for which the most common diameter is 62.5 micrometers. It is also used to measure the line width on a microchip. Intel's Pentium 4 microprocessors are built using 0.18 or 0.13 micrometer line widths. AMD's Athlon uses a 0.18 line width.