1Generally. Of or relating to a scale intermediate between microscopic and macroscopic.
Of an intermediate size, large enough for examination with the naked eye but small enough that the whole can be examined as a single entity.
Of or relating to a size intermediate between macroscopic and atomic (typically between 10−6 m and 10−8 m). Hence: influenced by or exhibiting both quantum and macroscopic phenomena.
1940s; earliest use found in Journal of the History of Ideas. From meso- + -scopic, after microscopic, macroscopic.