microscale

/M AY0 K R AH1 S K EY0 L/
noun
  1. 1

    A very small or microscopic scale

  2. 2

    The scale of microanalysis

  3. 3

    A scale of physical consideration or of bounds having a characteristic dimension typically ranging from 1 to 999 ยตm (under 1 mm)

Source: https://en.wiktionary.org/wiki/microscale