Submicroscopic (adjective)

1. Too small to be seen with a microscope.
2. So small that it cannot be seen using an ordinary microscope.
3. Referring to particles or structures that are too small to be seen with a microscope.

Origin:

Derived from the latin 'sub-' meaning under and 'microscopium' meaning microscope.

Examples:

1. The discovery of submicroscopic particles paved the way for new scientific advancements in the field of nanotechnology.
2. The submicroscopic organisms that were found in the water sample were studied by the scientists to understand their impact on the ecosystem.
3. The submicroscopic details of the cell's structure were critical to understanding its function.
4. The study of submicroscopic structures in the human body provided new insights into the mechanisms of diseases and their treatments.
5. The submicroscopic defects in the materials used for space travel had to be detected and fixed before launching the spacecraft.