In a manner that relates to a microscope or is so small it can only be seen through a microscope.

To a very small or fine degree; extremely small.

अत्यंत सूक्ष्म रूप से

English Usage: The changes in the material are microscopically small, making them difficult to detect.

Hindi Usage: सामग्री में परिवर्तन अत्यंत सूक्ष्म रूप से हैं, जो उन्हें पहचानना कठिन बनाते हैं।