Definitions of microscopic:

• adjective:   too small to be seen except under a microscope
• adjective:   extremely precise with great attention to details

  Example: "Examined it with microscopic care"

• adjective:   of or relating to or used in microscopy

  Example: "Microscopic analysis"

• adjective:   infinitely or immeasurably small

  Example: "Reduced to a microscopic scale"