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.
To help compare different orders of magnitude, this page lists lengths between 10â4 m and 10â3 m (100 Âµm and 1 mm). 1  100 Âµm â 1/10 of a millimetre. 2  100 Âµm â 0.00394 inches. 3  100 Âµm â average diameter of a strand of human hair.  100 Âµm â thickness of a coat of 1  paint. 100 Âµm â length of a dust particle.