microscopic
🇺🇸
/ˌmaɪkrəˈskɑːpɪk/
🇬🇧
/ˌmaɪkrəˈskɒpɪk/
too small to see without a microscope
The microscopic particles in the air can only be seen with special equipment.
using a microscope
Scientists use microscopic examination to study tiny organisms.