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extremely tiny, smaller than what a regular microscope can detect
- Viruses are submicroscopic, requiring electron microscopes to be observed.
- The lab studies submicroscopic particles in nanomaterials.
- Submicroscopic cracks in the metal eventually led to the bridge's collapse.
- Pollution includes submicroscopic plastics that contaminate water supplies.
- The artist's submicroscopic engravings on gemstones amazed scientists.