1. in a manner that is so small it can only be seen with a microscope; at a microscopic scale
2. in a way that examines or analyzes something in extremely fine detail

Examples

• The bacteria were microscopically small, invisible to the naked eye.
• She examined the fabric microscopically to detect any defects.
• The particles were microscopically dispersed throughout the solution.
• He analyzed the text microscopically, noting every grammatical nuance.
• The cracks in the surface were only visible microscopically.
• The researchers studied the organism's structure microscopically using advanced equipment.