Treatment of Cross-eyed: For more treatment information about Cross-eyed, see treatment of Squint (Cross-eyed).
It can be used to indicate a smaller than average scale (microscopic scale), as opposed to prefixes mega and macro, which can be used to indicate a larger than average scale. Micro may refer to: 1  micro- (Âµ) a prefix in the SI and other systems of units denoting a factor of 10 â6 (one millionth). 2  MICRO Information Management System, an early set-theoretic database management system. 3  Micro programming language, a simple programming language used in teaching compiler construction techniques.
The symbol Âµm is sometimes rendered as um if the symbol Âµ cannot be used, or if the writer is not aware of the distinction. The micrometre is a common unit of measurement for wavelengths of infrared radiation as well as sizes of biological cells and bacteria and is also commonly used in plastics manufacturing. Micrometres are the standard for grading wool (referring to the diameter of wool fibres).